diff --git a/labs/dynect/pom.xml b/labs/dynect/pom.xml
index c2fc25291f..739097b1ff 100644
--- a/labs/dynect/pom.xml
+++ b/labs/dynect/pom.xml
@@ -35,7 +35,7 @@
 
   <properties>
     <test.dynect.endpoint>https://api2.dynect.net/REST</test.dynect.endpoint>
-    <test.dynect.api-version>3.3.7</test.dynect.api-version>
+    <test.dynect.api-version>3.3.8</test.dynect.api-version>
     <test.dynect.build-version />
     <test.dynect.identity />
     <test.dynect.credential />
@@ -95,6 +95,8 @@
                   <goal>test</goal>
                 </goals>
                 <configuration>
+                  <!-- TODO: remove when multiple jobs/session are supported -->
+                  <threadCount>1</threadCount>
                   <systemPropertyVariables>
                     <test.dynect.endpoint>${test.dynect.endpoint}</test.dynect.endpoint>
                     <test.dynect.api-version>${test.dynect.api-version}</test.dynect.api-version>
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/DynECTApiMetadata.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/DynECTApiMetadata.java
index 428ef19393..40920e8ec2 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/DynECTApiMetadata.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/DynECTApiMetadata.java
@@ -73,7 +73,7 @@ public class DynECTApiMetadata extends BaseRestApiMetadata {
          .credentialName("Password")
          .defaultCredential(ANONYMOUS_IDENTITY)
          .documentation(URI.create("https://manage.dynect.net/help/docs/api2/rest/"))
-         .version("3.3.7")
+         .version("3.3.8")
          .defaultEndpoint("https://api2.dynect.net/REST")
          .defaultProperties(DynECTApiMetadata.defaultProperties())
          .defaultModules(ImmutableSet.<Class<? extends Module>>builder()
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/DynECTExceptions.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/DynECTExceptions.java
new file mode 100644
index 0000000000..ed0d2eff03
--- /dev/null
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/DynECTExceptions.java
@@ -0,0 +1,49 @@
+/**
+ * Licensed to jclouds, Inc. (jclouds) under one or more
+ * contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  jclouds licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.jclouds.dynect.v3;
+
+/**
+ * Exceptions likely to be encountered when using {@link DynECTApi}
+ * 
+ * @author Adrian Cole
+ */
+public interface DynECTExceptions {
+   /**
+    * You must wait until another job is finished before attempting this command
+    * again
+    */
+   public static class JobStillRunningException extends IllegalStateException {
+      private static final long serialVersionUID = 1L;
+
+      public JobStillRunningException(String message, Throwable cause) {
+         super(message, cause);
+      }
+   }
+
+   /**
+    * The Zone or other resource already exists
+    */
+   public static class TargetExistsException extends IllegalStateException {
+      private static final long serialVersionUID = 1L;
+
+      public TargetExistsException(String message, Throwable cause) {
+         super(message, cause);
+      }
+   }
+}
\ No newline at end of file
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/Record.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/Record.java
index 5aedaf6dd4..b68b7d4d28 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/Record.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/Record.java
@@ -26,18 +26,19 @@ import java.util.Map;
 import javax.inject.Named;
 
 import com.google.common.base.Objects.ToStringHelper;
+import com.google.common.primitives.UnsignedInteger;
 
 /**
  * @author Adrian Cole
  */
 public class Record<D extends Map<String, Object>> extends RecordId {
 
-   private final int ttl;
+   private final UnsignedInteger ttl;
    @Named("rdata")
    private final D rdata;
 
    @ConstructorProperties({ "zone", "fqdn", "record_type", "record_id", "ttl", "rdata" })
-   protected Record(String zone, String fqdn, String type, long id, int ttl, D rdata) {
+   protected Record(String zone, String fqdn, String type, long id, UnsignedInteger ttl, D rdata) {
       super(zone, fqdn, type, id);
       this.ttl = checkNotNull(ttl, "ttl of %s", id);
       this.rdata = checkNotNull(rdata, "rdata of %s", id);
@@ -46,7 +47,7 @@ public class Record<D extends Map<String, Object>> extends RecordId {
    /**
     * The current ttl of the record or zero if default for the zone
     */
-   public int getTTL() {
+   public UnsignedInteger getTTL() {
       return ttl;
    }
 
@@ -73,17 +74,24 @@ public class Record<D extends Map<String, Object>> extends RecordId {
 
    public abstract static class Builder<D extends Map<String, Object>, B extends Builder<D, B>> extends RecordId.Builder<B> {
 
-      protected int ttl;
+      protected UnsignedInteger ttl;
       protected D rdata;
 
       /**
        * @see Record#getTTL()
        */
-      public B ttl(int ttl) {
+      public B ttl(UnsignedInteger ttl) {
          this.ttl = ttl;
          return self();
       }
 
+      /**
+       * @see Record#getTTL()
+       */
+      public B ttl(int ttl) {
+         return ttl(UnsignedInteger.fromIntBits(ttl));
+      }
+
       /**
        * @see Record#getRData()
        */
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/SOARecord.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/SOARecord.java
index ec8593a786..9df446857d 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/SOARecord.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/domain/SOARecord.java
@@ -28,6 +28,7 @@ import org.jclouds.dynect.v3.domain.Zone.SerialStyle;
 import org.jclouds.dynect.v3.domain.rdata.SOAData;
 
 import com.google.common.base.Objects.ToStringHelper;
+import com.google.common.primitives.UnsignedInteger;
 
 /**
  * Start of Authority per RFC 1035
@@ -40,7 +41,7 @@ public final class SOARecord extends Record<SOAData> {
    private final SerialStyle serialStyle;
 
    @ConstructorProperties({ "zone", "fqdn", "record_type", "record_id", "ttl", "rdata", "serial_style" })
-   private SOARecord(String zone, String fqdn, String type, long id, int ttl, SOAData rdata, SerialStyle serialStyle) {
+   private SOARecord(String zone, String fqdn, String type, long id, UnsignedInteger ttl, SOAData rdata, SerialStyle serialStyle) {
       super(zone, fqdn, type, id, ttl, rdata);
       this.serialStyle = checkNotNull(serialStyle, "serialStyle of %s", id);
    }
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordApi.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordApi.java
index e20ed36c2d..63a019b57e 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordApi.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordApi.java
@@ -20,6 +20,7 @@ package org.jclouds.dynect.v3.features;
 
 import java.util.Map;
 
+import org.jclouds.dynect.v3.DynECTExceptions.JobStillRunningException;
 import org.jclouds.dynect.v3.domain.Record;
 import org.jclouds.dynect.v3.domain.RecordId;
 import org.jclouds.dynect.v3.domain.SOARecord;
@@ -41,16 +42,16 @@ import com.google.common.collect.FluentIterable;
 public interface RecordApi {
    /**
     * Retrieves a list of resource record ids for all records of any type in the
-    * given zone;
+    * given zone throws JobStillRunningException;
     */
-   FluentIterable<RecordId> list();
+   FluentIterable<RecordId> list() throws JobStillRunningException;
 
    /**
     * retrieves a resource record without regard to type
     * 
     * @return null if not found
     */
-   Record<? extends Map<String, Object>> get(RecordId recordId);
+   Record<? extends Map<String, Object>> get(RecordId recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link AAAARecord} or null if not present.
@@ -61,7 +62,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<AAAAData> getAAAA(String fqdn, long recordId);
+   Record<AAAAData> getAAAA(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link ARecord} or null if not present.
@@ -72,7 +73,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<AData> getA(String fqdn, long recordId);
+   Record<AData> getA(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link CNAMERecord} or null if not present.
@@ -83,7 +84,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<CNAMEData> getCNAME(String fqdn, long recordId);
+   Record<CNAMEData> getCNAME(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link MXRecord} or null if not present.
@@ -94,7 +95,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<MXData> getMX(String fqdn, long recordId);
+   Record<MXData> getMX(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link NSRecord} or null if not present.
@@ -105,7 +106,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<NSData> getNS(String fqdn, long recordId);
+   Record<NSData> getNS(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link PTRRecord} or null if not present.
@@ -116,7 +117,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<PTRData> getPTR(String fqdn, long recordId);
+   Record<PTRData> getPTR(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link SOARecord} or null if not present.
@@ -127,7 +128,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   SOARecord getSOA(String fqdn, long recordId);
+   SOARecord getSOA(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link SRVRecord} or null if not present.
@@ -138,7 +139,7 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<SRVData> getSRV(String fqdn, long recordId);
+   Record<SRVData> getSRV(String fqdn, long recordId) throws JobStillRunningException;
 
    /**
     * Gets the {@link TXTRecord} or null if not present.
@@ -149,5 +150,5 @@ public interface RecordApi {
     *           {@link RecordId#getId()}
     * @return null if not found
     */
-   Record<TXTData> getTXT(String fqdn, long recordId);
+   Record<TXTData> getTXT(String fqdn, long recordId) throws JobStillRunningException;
 }
\ No newline at end of file
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordAsyncApi.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordAsyncApi.java
index c2b7e3804d..3ae7c13e80 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordAsyncApi.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/RecordAsyncApi.java
@@ -32,6 +32,7 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 
 import org.jclouds.Fallbacks.NullOnNotFoundOr404;
+import org.jclouds.dynect.v3.DynECTExceptions.JobStillRunningException;
 import org.jclouds.dynect.v3.domain.Record;
 import org.jclouds.dynect.v3.domain.RecordId;
 import org.jclouds.dynect.v3.domain.SOARecord;
@@ -78,7 +79,7 @@ public interface RecordAsyncApi {
    @GET
    @Path("/AllRecord/{zone}")
    @ResponseParser(ToRecordIds.class)
-   ListenableFuture<FluentIterable<RecordId>> list();
+   ListenableFuture<FluentIterable<RecordId>> list() throws JobStillRunningException;
 
    /**
     * @see RecordApi#get
@@ -87,7 +88,7 @@ public interface RecordAsyncApi {
    @GET
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<? extends Map<String, Object>>> get(@BinderParam(RecordIdBinder.class) RecordId recordId);
+   ListenableFuture<Record<? extends Map<String, Object>>> get(@BinderParam(RecordIdBinder.class) RecordId recordId) throws JobStillRunningException;
 
    static class RecordIdBinder implements Binder {
       @SuppressWarnings("unchecked")
@@ -113,7 +114,7 @@ public interface RecordAsyncApi {
    @Path("/AAAARecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<AAAAData>> getAAAA(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<AAAAData>> getAAAA(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getA
@@ -123,7 +124,7 @@ public interface RecordAsyncApi {
    @Path("/ARecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<AData>> getA(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<AData>> getA(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getCNAME
@@ -133,7 +134,7 @@ public interface RecordAsyncApi {
    @Path("/CNAMERecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<CNAMEData>> getCNAME(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<CNAMEData>> getCNAME(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getMX
@@ -143,7 +144,7 @@ public interface RecordAsyncApi {
    @Path("/MXRecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<MXData>> getMX(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<MXData>> getMX(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getNS
@@ -153,7 +154,7 @@ public interface RecordAsyncApi {
    @Path("/NSRecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<NSData>> getNS(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<NSData>> getNS(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getPTR
@@ -163,7 +164,7 @@ public interface RecordAsyncApi {
    @Path("/PTRRecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<PTRData>> getPTR(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<PTRData>> getPTR(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getSOA
@@ -173,7 +174,7 @@ public interface RecordAsyncApi {
    @Path("/SOARecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<SOARecord> getSOA(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<SOARecord> getSOA(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getSRV
@@ -183,7 +184,7 @@ public interface RecordAsyncApi {
    @Path("/SRVRecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<SRVData>> getSRV(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<SRVData>> getSRV(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 
    /**
     * @see RecordApi#getTXT
@@ -193,5 +194,5 @@ public interface RecordAsyncApi {
    @Path("/TXTRecord/{zone}/{fqdn}/{id}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Record<TXTData>> getTXT(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId);
+   ListenableFuture<Record<TXTData>> getTXT(@PathParam("fqdn") String fqdn, @PathParam("id") long recordId) throws JobStillRunningException;
 }
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneApi.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneApi.java
index 193f520177..b9cf4a5867 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneApi.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneApi.java
@@ -18,6 +18,8 @@
  */
 package org.jclouds.dynect.v3.features;
 
+import org.jclouds.dynect.v3.DynECTExceptions.TargetExistsException;
+import org.jclouds.dynect.v3.DynECTExceptions.JobStillRunningException;
 import org.jclouds.dynect.v3.domain.CreatePrimaryZone;
 import org.jclouds.dynect.v3.domain.Job;
 import org.jclouds.dynect.v3.domain.Zone;
@@ -34,7 +36,7 @@ public interface ZoneApi {
    /**
     * Lists all zone ids.
     */
-   FluentIterable<String> list();
+   FluentIterable<String> list() throws JobStillRunningException;
 
    /**
     * Creates a new primary zone.
@@ -43,7 +45,7 @@ public interface ZoneApi {
     *           required parameters to create the zone.
     * @return unpublished zone
     */
-   Zone create(CreatePrimaryZone zone);
+   Zone create(CreatePrimaryZone zone) throws JobStillRunningException, TargetExistsException;
 
    /**
     * Creates a new primary zone with one hour default TTL and
@@ -55,7 +57,7 @@ public interface ZoneApi {
     *           email address of the contact
     * @return unpublished zone
     */
-   Zone createWithContact(String fqdn, String contact);
+   Zone createWithContact(String fqdn, String contact) throws JobStillRunningException, TargetExistsException;
 
    /**
     * Retrieves information about the specified zone.
@@ -66,7 +68,7 @@ public interface ZoneApi {
     * @return null if not found
     */
    @Nullable
-   Zone get(String fqdn);
+   Zone get(String fqdn) throws JobStillRunningException;
 
    /**
     * deletes the specified zone.
@@ -76,7 +78,16 @@ public interface ZoneApi {
     * @return null if not found
     */
    @Nullable
-   Job delete(String fqdn);
+   Job delete(String fqdn) throws JobStillRunningException;
+
+   /**
+    * Deletes changes to the specified zone that have been created during the
+    * current session but not yet published to the zone.
+    * 
+    * @param fqdn
+    *           fqdn of the zone to delete changes from ex {@code jclouds.org}
+    */
+   Job deleteChanges(String fqdn) throws JobStillRunningException;
 
    /**
     * Publishes the current zone
@@ -85,7 +96,7 @@ public interface ZoneApi {
     *           fqdn of the zone to publish. ex
     *           {@code jclouds.org}
     */
-   Zone publish(String fqdn);
+   Zone publish(String fqdn) throws JobStillRunningException;
 
    /**
     * freezes the specified zone.
@@ -93,7 +104,7 @@ public interface ZoneApi {
     * @param fqdn
     *           fqdn of the zone to freeze ex {@code jclouds.org}
     */
-   Job freeze(String fqdn);
+   Job freeze(String fqdn) throws JobStillRunningException;
    
    /**
     * thaws the specified zone.
@@ -101,5 +112,5 @@ public interface ZoneApi {
     * @param fqdn
     *           fqdn of the zone to thaw ex {@code jclouds.org}
     */
-   Job thaw(String fqdn);
+   Job thaw(String fqdn) throws JobStillRunningException;
 }
\ No newline at end of file
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneAsyncApi.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneAsyncApi.java
index 7335460260..23012d7a42 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneAsyncApi.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/features/ZoneAsyncApi.java
@@ -31,6 +31,8 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 
 import org.jclouds.Fallbacks.NullOnNotFoundOr404;
+import org.jclouds.dynect.v3.DynECTExceptions.TargetExistsException;
+import org.jclouds.dynect.v3.DynECTExceptions.JobStillRunningException;
 import org.jclouds.dynect.v3.domain.CreatePrimaryZone;
 import org.jclouds.dynect.v3.domain.CreatePrimaryZone.ToFQDN;
 import org.jclouds.dynect.v3.domain.Job;
@@ -61,7 +63,6 @@ import com.google.common.util.concurrent.ListenableFuture;
 // required for all calls
 @Produces(APPLICATION_JSON)
 @Headers(keys = "API-Version", values = "{jclouds.api-version}")
-@Path("/Zone")
 @RequestFilters(SessionManager.class)
 public interface ZoneAsyncApi {
 
@@ -70,29 +71,31 @@ public interface ZoneAsyncApi {
     */
    @Named("ListZones")
    @GET
+   @Path("/Zone")
    @SelectJson("data")
    @Transform(ExtractZoneNames.class)
-   ListenableFuture<FluentIterable<String>> list();
+   ListenableFuture<FluentIterable<String>> list() throws JobStillRunningException;
 
    /**
     * @see ZoneApi#get
     */
    @Named("GetZone")
    @GET
-   @Path("/{fqdn}")
+   @Path("/Zone/{fqdn}")
    @SelectJson("data")
    @Fallback(NullOnNotFoundOr404.class)
-   ListenableFuture<Zone> get(@PathParam("fqdn") String fqdn);
+   ListenableFuture<Zone> get(@PathParam("fqdn") String fqdn) throws JobStillRunningException;
 
    /**
     * @see ZoneApi#create
     */
    @Named("CreatePrimaryZone")
    @POST
-   @Path("/{fqdn}")
+   @Path("/Zone/{fqdn}")
    @SelectJson("data")
    ListenableFuture<Zone> create(
-         @PathParam("fqdn") @ParamParser(ToFQDN.class) @BinderParam(BindToJsonPayload.class) CreatePrimaryZone createZone);
+         @PathParam("fqdn") @ParamParser(ToFQDN.class) @BinderParam(BindToJsonPayload.class) CreatePrimaryZone createZone)
+         throws JobStillRunningException, TargetExistsException;
 
    /**
     * @see ZoneApi#createWithContact
@@ -100,19 +103,29 @@ public interface ZoneAsyncApi {
    @Named("CreatePrimaryZone")
    @POST
    @Payload("%7B\"rname\":\"{contact}\",\"serial_style\":\"increment\",\"ttl\":3600%7D")
-   @Path("/{fqdn}")
+   @Path("/Zone/{fqdn}")
    @SelectJson("data")
-   ListenableFuture<Zone> createWithContact(@PathParam("fqdn") String fqdn, @PayloadParam("contact") String contact);
+   ListenableFuture<Zone> createWithContact(@PathParam("fqdn") String fqdn, @PayloadParam("contact") String contact)
+         throws JobStillRunningException, TargetExistsException;
 
    /**
     * @see ZoneApi#delete
     */
    @Named("DeleteZone")
    @DELETE
-   @Path("/{fqdn}")
+   @Path("/Zone/{fqdn}")
    @Fallback(NullOnNotFoundOr404.class)
    @Consumes(APPLICATION_JSON)
-   ListenableFuture<Job> delete(@PathParam("fqdn") String fqdn);
+   ListenableFuture<Job> delete(@PathParam("fqdn") String fqdn) throws JobStillRunningException;
+
+   /**
+    * @see ZoneApi#deleteChanges
+    */
+   @Named("DeleteZoneChanges")
+   @DELETE
+   @Path("/ZoneChanges/{fqdn}")
+   @Consumes(APPLICATION_JSON)
+   ListenableFuture<Job> deleteChanges(@PathParam("fqdn") String fqdn) throws JobStillRunningException;
 
    /**
     * @see ZoneApi#publish
@@ -120,27 +133,27 @@ public interface ZoneAsyncApi {
    @Named("PublishZone")
    @PUT
    @Payload("{\"publish\":true}")
-   @Path("/{fqdn}")
+   @Path("/Zone/{fqdn}")
    @SelectJson("data")
-   ListenableFuture<Zone> publish(@PathParam("fqdn") String fqdn);
+   ListenableFuture<Zone> publish(@PathParam("fqdn") String fqdn) throws JobStillRunningException;
    
    /**
     * @see ZoneApi#freeze
     */
    @Named("FreezeZone")
    @PUT
-   @Path("/{fqdn}")
+   @Path("/Zone/{fqdn}")
    @Payload("{\"freeze\":true}")
    @Consumes(APPLICATION_JSON)
-   ListenableFuture<Job> freeze(@PathParam("fqdn") String fqdn);
+   ListenableFuture<Job> freeze(@PathParam("fqdn") String fqdn) throws JobStillRunningException;
 
    /**
     * @see ZoneApi#thaw
     */
    @Named("ThawZone")
    @PUT
-   @Path("/{fqdn}")
+   @Path("/Zone/{fqdn}")
    @Payload("{\"thaw\":true}")
    @Consumes(APPLICATION_JSON)
-   ListenableFuture<Job> thaw(@PathParam("fqdn") String fqdn);
+   ListenableFuture<Job> thaw(@PathParam("fqdn") String fqdn) throws JobStillRunningException;
 }
diff --git a/labs/dynect/src/main/java/org/jclouds/dynect/v3/handlers/DynECTErrorHandler.java b/labs/dynect/src/main/java/org/jclouds/dynect/v3/handlers/DynECTErrorHandler.java
index b2f4afdabb..c0d4577f81 100644
--- a/labs/dynect/src/main/java/org/jclouds/dynect/v3/handlers/DynECTErrorHandler.java
+++ b/labs/dynect/src/main/java/org/jclouds/dynect/v3/handlers/DynECTErrorHandler.java
@@ -21,6 +21,8 @@ package org.jclouds.dynect.v3.handlers;
 import static org.jclouds.http.HttpUtils.closeClientButKeepContentStream;
 import static org.jclouds.http.HttpUtils.releasePayload;
 
+import org.jclouds.dynect.v3.DynECTExceptions.TargetExistsException;
+import org.jclouds.dynect.v3.DynECTExceptions.JobStillRunningException;
 import org.jclouds.http.HttpCommand;
 import org.jclouds.http.HttpErrorHandler;
 import org.jclouds.http.HttpResponse;
@@ -31,7 +33,9 @@ import org.jclouds.http.HttpResponseException;
  */
 public class DynECTErrorHandler implements HttpErrorHandler {
    private static final String JOB_STILL_RUNNING = "This session already has a job running";
-
+   private static final String OPERATION_BLOCKED = "Operation blocked by current task";
+   private static final String TARGET_EXISTS = "Name already exists";
+   
    public void handleError(HttpCommand command, HttpResponse response) {
       Exception exception = new HttpResponseException(command, response);
       try {
@@ -40,7 +44,11 @@ public class DynECTErrorHandler implements HttpErrorHandler {
          if (message != null) {
             exception = new HttpResponseException(command, response, message);
             if (message.indexOf(JOB_STILL_RUNNING) != -1)
-               exception = new IllegalStateException(JOB_STILL_RUNNING, exception);
+               exception = new JobStillRunningException(JOB_STILL_RUNNING, exception);
+            else if (message.indexOf(OPERATION_BLOCKED) != -1)
+               exception = new JobStillRunningException(OPERATION_BLOCKED, exception);
+            else if (message.indexOf(TARGET_EXISTS) != -1)
+               exception = new TargetExistsException(TARGET_EXISTS, exception);
          } else {
             exception = new HttpResponseException(command, response);
          }
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/DynectApiMockTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/DynectApiMockTest.java
index 09f53bb8cc..14d5cef098 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/DynectApiMockTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/DynectApiMockTest.java
@@ -21,6 +21,8 @@ package org.jclouds.dynect.v3;
 import java.io.IOException;
 
 import org.jclouds.ContextBuilder;
+import org.jclouds.dynect.v3.DynECTExceptions.TargetExistsException;
+import org.jclouds.dynect.v3.DynECTExceptions.JobStillRunningException;
 import org.jclouds.rest.RestContext;
 import org.testng.annotations.Test;
 
@@ -31,21 +33,59 @@ import com.google.mockwebserver.MockWebServer;
  * 
  * @author Adrian Cole
  */
-@Test
+@Test(singleThreaded = true)
 public class DynectApiMockTest {
 
    static RestContext<DynECTApi, DynECTAsyncApi> getContext(String uri) {
       return ContextBuilder.newBuilder("dynect").credentials("jclouds:joe", "letmein").endpoint(uri).build();
    }
 
-   String session = "{\"status\": \"success\", \"data\": {\"token\": \"FFFFFFFFFF\", \"version\": \"3.3.7\"}, \"job_id\": 254417252, \"msgs\": [{\"INFO\": \"login: Login successful\", \"SOURCE\": \"BLL\", \"ERR_CD\": null, \"LVL\": \"INFO\"}]}";
-   String failure = "{\"status\": \"failure\", \"data\": {}, \"job_id\": 274509427, \"msgs\": [{\"INFO\": \"token: This session already has a job running\", \"SOURCE\": \"API-B\", \"ERR_CD\": \"OPERATION_FAILED\", \"LVL\": \"ERROR\"}]}";
+   String session = "{\"status\": \"success\", \"data\": {\"token\": \"FFFFFFFFFF\", \"version\": \"3.3.8\"}, \"job_id\": 254417252, \"msgs\": [{\"INFO\": \"login: Login successful\", \"SOURCE\": \"BLL\", \"ERR_CD\": null, \"LVL\": \"INFO\"}]}";
 
-   @Test(expectedExceptions = IllegalStateException.class, expectedExceptionsMessageRegExp = "This session already has a job running")
-   public void test200OnFailureThrowsExceptionWithoutRetry() throws IOException, InterruptedException {
+   String running = "{\"status\": \"running\", \"data\": {}, \"job_id\": 274509427, \"msgs\": [{\"INFO\": \"token: This session already has a job running\", \"SOURCE\": \"API-B\", \"ERR_CD\": \"OPERATION_FAILED\", \"LVL\": \"ERROR\"}]}";
+
+   @Test(expectedExceptions = JobStillRunningException.class, expectedExceptionsMessageRegExp = "This session already has a job running")
+   public void test200OnFailureThrowsExceptionWithoutRetryWhenJobRunning() throws IOException, InterruptedException {
       MockWebServer server = new MockWebServer();
       server.enqueue(new MockResponse().setResponseCode(200).setBody(session));
-      server.enqueue(new MockResponse().setResponseCode(200).setBody(failure));
+      server.enqueue(new MockResponse().setResponseCode(200).setBody(running));
+      server.play();
+
+      DynECTApi api = getContext(server.getUrl("/").toString()).getApi();
+
+      try {
+         api.getZoneApi().list();
+      } finally {
+         server.shutdown();
+      }
+   }
+
+   String taskBlocking = "[{\"status\": \"failure\", \"data\": {}, \"job_id\": 275545493, \"msgs\": [{\"INFO\": \"zone: Operation blocked by current task\", \"SOURCE\": \"BLL\", \"ERR_CD\": \"ILLEGAL_OPERATION\", \"LVL\": \"ERROR\"}, {\"INFO\": \"task_name: ProvisionZone\", \"SOURCE\": \"BLL\", \"ERR_CD\": null, \"LVL\": \"INFO\"}, {\"INFO\": \"task_id: 39120953\", \"SOURCE\": \"BLL\", \"ERR_CD\": null, \"LVL\": \"INFO\"}]}]";
+
+   @Test(expectedExceptions = JobStillRunningException.class, expectedExceptionsMessageRegExp = "Operation blocked by current task")
+   public void test200OnFailureThrowsExceptionWithoutRetryWhenOperationBlocked() throws IOException,
+         InterruptedException {
+      MockWebServer server = new MockWebServer();
+      server.enqueue(new MockResponse().setResponseCode(200).setBody(session));
+      server.enqueue(new MockResponse().setResponseCode(200).setBody(taskBlocking));
+      server.play();
+
+      DynECTApi api = getContext(server.getUrl("/").toString()).getApi();
+
+      try {
+         api.getZoneApi().list();
+      } finally {
+         server.shutdown();
+      }
+   }
+
+   String targetExists = "[{\"status\": \"failure\", \"data\": {}, \"job_id\": 275533917, \"msgs\": [{\"INFO\": \"name: Name already exists\", \"SOURCE\": \"BLL\", \"ERR_CD\": \"TARGET_EXISTS\", \"LVL\": \"ERROR\"}, {\"INFO\": \"create: You already have this zone.\", \"SOURCE\": \"BLL\", \"ERR_CD\": null, \"LVL\": \"INFO\"}]}]";
+
+   @Test(expectedExceptions = TargetExistsException.class, expectedExceptionsMessageRegExp = "Name already exists")
+   public void test200OnFailureThrowsExceptionWithoutRetryOnNameExists() throws IOException, InterruptedException {
+      MockWebServer server = new MockWebServer();
+      server.enqueue(new MockResponse().setResponseCode(200).setBody(session));
+      server.enqueue(new MockResponse().setResponseCode(200).setBody(targetExists));
       server.play();
 
       DynECTApi api = getContext(server.getUrl("/").toString()).getApi();
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiExpectTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiExpectTest.java
index 6721746067..944847e0d7 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiExpectTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiExpectTest.java
@@ -48,7 +48,7 @@ import org.testng.annotations.Test;
 public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
    HttpRequest getSOA = HttpRequest.builder().method("GET")
                                 .endpoint("https://api2.dynect.net/REST/SOARecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-                                .addHeader("API-Version", "3.3.7")
+                                .addHeader("API-Version", "3.3.8")
                                 .addHeader("Auth-Token", authToken)
                                 .payload(emptyJsonPayload()).build();   
 
@@ -74,7 +74,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getAAAA = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/AAAARecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -100,7 +100,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getA = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/ARecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -126,7 +126,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getCNAME = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/CNAMERecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -152,7 +152,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getMX = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/MXRecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -178,7 +178,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getNS = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/NSRecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -204,7 +204,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getPTR = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/PTRRecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -241,7 +241,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getSRV = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/SRVRecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -262,7 +262,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest getTXT = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/TXTRecord/adrianc.zone.dynecttest.jclouds.org/adrianc.zone.dynecttest.jclouds.org/50976579")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload()).build();   
    
@@ -288,7 +288,7 @@ public class RecordApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest list = HttpRequest.builder().method("GET")
                                  .endpoint("https://api2.dynect.net/REST/AllRecord/adrianc.zone.dynecttest.jclouds.org")
-                                 .addHeader("API-Version", "3.3.7")
+                                 .addHeader("API-Version", "3.3.8")
                                  .addHeader("Auth-Token", authToken)
                                  .payload(emptyJsonPayload()).build();   
 
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiLiveTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiLiveTest.java
index 985da1cebc..16fb2e25ce 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiLiveTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/RecordApiLiveTest.java
@@ -52,14 +52,14 @@ public class RecordApiLiveTest extends BaseDynECTApiLiveTest {
       assertTrue(record.getId() > 0, "Id cannot be zero for RecordId: " + record);
       checkNotNull(record.getType(), "Type cannot be null for RecordId: %s", record);
       checkNotNull(record.getFQDN(), "FQDN cannot be null for RecordId: %s", record);
-      checkNotNull(record.getZone(), "Serial cannot be null for RecordId: %s", record);
+      checkNotNull(record.getZone(), "Zone cannot be null for RecordId: %s", record);
    }
 
    private void checkRecord(Record<? extends Map<String, Object>> record) {
       checkRecordId(record);
       assertTrue(record.getRData().size() > 0, "RData entries should be present for cannot be zero for Record: "
             + record);
-      assertTrue(record.getTTL() > -1, "TTL cannot be negative for RecordId: " + record);
+      checkNotNull(record.getTTL(), "TTL cannot be null for RecordId: %s", record);
    }
 
    @Test
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/SessionApiExpectTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/SessionApiExpectTest.java
index dbc75b22c4..20b339b0d9 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/SessionApiExpectTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/SessionApiExpectTest.java
@@ -48,7 +48,7 @@ public class SessionApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest isValid = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/Session")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload())
          .build();   
@@ -71,7 +71,7 @@ public class SessionApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest logout = HttpRequest.builder().method("DELETE")
          .endpoint("https://api2.dynect.net/REST/Session")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload())
          .build();   
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiExpectTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiExpectTest.java
index b1cdc9fdaf..5fbb7a597d 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiExpectTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiExpectTest.java
@@ -26,6 +26,7 @@ import static org.testng.Assert.assertNull;
 import org.jclouds.dynect.v3.DynECTApi;
 import org.jclouds.dynect.v3.domain.CreatePrimaryZone;
 import org.jclouds.dynect.v3.internal.BaseDynECTApiExpectTest;
+import org.jclouds.dynect.v3.parse.DeleteZoneChangesResponseTest;
 import org.jclouds.dynect.v3.parse.DeleteZoneResponseTest;
 import org.jclouds.dynect.v3.parse.GetZoneResponseTest;
 import org.jclouds.dynect.v3.parse.ListZonesResponseTest;
@@ -40,7 +41,7 @@ import org.testng.annotations.Test;
 public class ZoneApiExpectTest extends BaseDynECTApiExpectTest {
    HttpRequest get = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/Zone/jclouds.org")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload())
          .build();   
@@ -56,7 +57,7 @@ public class ZoneApiExpectTest extends BaseDynECTApiExpectTest {
    
    HttpRequest create = HttpRequest.builder().method("POST")
          .endpoint("https://api2.dynect.net/REST/Zone/jclouds.org")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(stringPayload("{\"rname\":\"jimmy@jclouds.org\",\"serial_style\":\"increment\",\"ttl\":3600}"))
          .build();   
@@ -83,7 +84,7 @@ public class ZoneApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest list = HttpRequest.builder().method("GET")
          .endpoint("https://api2.dynect.net/REST/Zone")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload())
          .build();   
@@ -96,10 +97,27 @@ public class ZoneApiExpectTest extends BaseDynECTApiExpectTest {
       assertEquals(success.getZoneApi().list().toString(),
                    new ListZonesResponseTest().expected().toString());
    }
-   
+
+   HttpRequest deleteChanges = HttpRequest.builder().method("DELETE")
+         .endpoint("https://api2.dynect.net/REST/ZoneChanges/jclouds.org")
+         .addHeader("API-Version", "3.3.8")
+         .addHeader(ACCEPT, APPLICATION_JSON)
+         .addHeader("Auth-Token", authToken)
+         .payload(emptyJsonPayload())
+         .build();
+
+   HttpResponse deleteChangesResponse = HttpResponse.builder().statusCode(200)
+         .payload(payloadFromResourceWithContentType("/delete_zone_changes.json", APPLICATION_JSON)).build();
+
+   public void testDeleteChangesWhenResponseIs2xx() {
+      DynECTApi success = requestsSendResponses(createSession, createSessionResponse, deleteChanges, deleteChangesResponse);
+      assertEquals(success.getZoneApi().deleteChanges("jclouds.org").toString(),
+                   new DeleteZoneChangesResponseTest().expected().toString());
+   }
+
    HttpRequest delete = HttpRequest.builder().method("DELETE")
          .endpoint("https://api2.dynect.net/REST/Zone/jclouds.org")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader(ACCEPT, APPLICATION_JSON)
          .addHeader("Auth-Token", authToken)
          .payload(emptyJsonPayload())
@@ -121,7 +139,7 @@ public class ZoneApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest publish = HttpRequest.builder().method("PUT")
          .endpoint("https://api2.dynect.net/REST/Zone/jclouds.org")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader("Auth-Token", authToken)
          .payload(stringPayload("{\"publish\":true}"))
          .build();   
@@ -134,7 +152,7 @@ public class ZoneApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest freeze = HttpRequest.builder().method("PUT")
          .endpoint("https://api2.dynect.net/REST/Zone/jclouds.org")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader(ACCEPT, APPLICATION_JSON)
          .addHeader("Auth-Token", authToken)
          .payload(stringPayload("{\"freeze\":true}"))
@@ -148,7 +166,7 @@ public class ZoneApiExpectTest extends BaseDynECTApiExpectTest {
 
    HttpRequest thaw = HttpRequest.builder().method("PUT")
          .endpoint("https://api2.dynect.net/REST/Zone/jclouds.org")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .addHeader(ACCEPT, APPLICATION_JSON)
          .addHeader("Auth-Token", authToken)
          .payload(stringPayload("{\"thaw\":true}"))
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiLiveTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiLiveTest.java
index c3b9c3f3c4..231c9f5402 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiLiveTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/features/ZoneApiLiveTest.java
@@ -36,7 +36,7 @@ import com.google.common.collect.ImmutableList;
 /**
  * @author Adrian Cole
  */
-@Test(groups = "live", testName = "ZoneApiLiveTest")
+@Test(groups = "live", singleThreaded = true, testName = "ZoneApiLiveTest")
 public class ZoneApiLiveTest extends BaseDynECTApiLiveTest {
 
    private void checkZone(Zone zone) {
@@ -102,6 +102,13 @@ public class ZoneApiLiveTest extends BaseDynECTApiLiveTest {
    }
 
    @Test(dependsOnMethods = "testThawZone")
+   public void testDeleteZoneChanges() {
+      Job job = api().deleteChanges(fqdn);
+      assertEquals(job.getStatus(), Status.SUCCESS);
+      assertEquals(context.getApi().getJob(job.getId()), job);
+   }
+
+   @Test(dependsOnMethods = "testDeleteZoneChanges")
    public void testDeleteZone() {
       Job job = api().delete(fqdn);
       assertEquals(job.getStatus(), Status.SUCCESS);
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/handlers/GetJobRedirectionRetryHandlerExpectTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/handlers/GetJobRedirectionRetryHandlerExpectTest.java
index 17456bcd04..6e18f54c6f 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/handlers/GetJobRedirectionRetryHandlerExpectTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/handlers/GetJobRedirectionRetryHandlerExpectTest.java
@@ -39,7 +39,7 @@ public class GetJobRedirectionRetryHandlerExpectTest extends BaseDynECTApiExpect
 
       HttpRequest thaw = HttpRequest.builder().method("PUT")
                                     .endpoint("https://api2.dynect.net/REST/Zone/jclouds.org")
-                                    .addHeader("API-Version", "3.3.7")
+                                    .addHeader("API-Version", "3.3.8")
                                     .addHeader(ACCEPT, APPLICATION_JSON)
                                     .addHeader("Auth-Token", authToken)
                                     .payload(stringPayload("{\"thaw\":true}"))
@@ -52,7 +52,7 @@ public class GetJobRedirectionRetryHandlerExpectTest extends BaseDynECTApiExpect
 
       HttpRequest job = HttpRequest.builder().method("GET")
                                    .endpoint("https://api2.dynect.net/REST/Job/1234")
-                                   .addHeader("API-Version", "3.3.7")
+                                   .addHeader("API-Version", "3.3.8")
                                    .addHeader(ACCEPT, APPLICATION_JSON)
                                    .addHeader("Auth-Token", authToken)
                                    .payload(emptyJsonPayload())
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/internal/BaseDynECTExpectTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/internal/BaseDynECTExpectTest.java
index 6697af88e7..c8733f6dc6 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/internal/BaseDynECTExpectTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/internal/BaseDynECTExpectTest.java
@@ -80,7 +80,7 @@ public class BaseDynECTExpectTest<T> extends BaseRestApiExpectTest<T> {
          .builder()
          .method("POST")
          .endpoint("https://api2.dynect.net/REST/Session")
-         .addHeader("API-Version", "3.3.7")
+         .addHeader("API-Version", "3.3.8")
          .payload(
                payloadFromStringWithContentType(
                      "{\"customer_name\":\"jclouds\",\"user_name\":\"joe\",\"password\":\"letmein\"}", APPLICATION_JSON))
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/parse/CreateSessionResponseTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/parse/CreateSessionResponseTest.java
index f3019ed297..41a1c7131f 100644
--- a/labs/dynect/src/test/java/org/jclouds/dynect/v3/parse/CreateSessionResponseTest.java
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/parse/CreateSessionResponseTest.java
@@ -42,6 +42,6 @@ public class CreateSessionResponseTest extends BaseDynECTParseTest<Session> {
    @SelectJson("data")
    @Consumes(MediaType.APPLICATION_JSON)
    public Session expected() {
-      return Session.forTokenAndVersion("FFFFFFFFFF", "3.3.7");
+      return Session.forTokenAndVersion("FFFFFFFFFF", "3.3.8");
    }
 }
diff --git a/labs/dynect/src/test/java/org/jclouds/dynect/v3/parse/DeleteZoneChangesResponseTest.java b/labs/dynect/src/test/java/org/jclouds/dynect/v3/parse/DeleteZoneChangesResponseTest.java
new file mode 100644
index 0000000000..49d8d4e70f
--- /dev/null
+++ b/labs/dynect/src/test/java/org/jclouds/dynect/v3/parse/DeleteZoneChangesResponseTest.java
@@ -0,0 +1,45 @@
+/**
+ * Licensed to jclouds, Inc. (jclouds) under one or more
+ * contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  jclouds licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.jclouds.dynect.v3.parse;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.core.MediaType;
+
+import org.jclouds.dynect.v3.domain.Job;
+import org.jclouds.dynect.v3.internal.BaseDynECTParseTest;
+import org.testng.annotations.Test;
+
+/**
+ * @author Adrian Cole
+ */
+@Test(groups = "unit")
+public class DeleteZoneChangesResponseTest extends BaseDynECTParseTest<Job> {
+
+   @Override
+   public String resource() {
+      return "/delete_zone_changes.json";
+   }
+
+   @Override
+   @Consumes(MediaType.APPLICATION_JSON)
+   public Job expected() {
+      return Job.success(275625520l);
+   }
+}
diff --git a/labs/dynect/src/test/resources/create_session.json b/labs/dynect/src/test/resources/create_session.json
index 7b4860fda5..9eaa9bee65 100644
--- a/labs/dynect/src/test/resources/create_session.json
+++ b/labs/dynect/src/test/resources/create_session.json
@@ -1 +1 @@
-{"status": "success", "data": {"token": "FFFFFFFFFF", "version": "3.3.7"}, "job_id": 254417252, "msgs": [{"INFO": "login: Login successful", "SOURCE": "BLL", "ERR_CD": null, "LVL": "INFO"}]}
\ No newline at end of file
+{"status": "success", "data": {"token": "FFFFFFFFFF", "version": "3.3.8"}, "job_id": 254417252, "msgs": [{"INFO": "login: Login successful", "SOURCE": "BLL", "ERR_CD": null, "LVL": "INFO"}]}
\ No newline at end of file
diff --git a/labs/dynect/src/test/resources/delete_zone_changes.json b/labs/dynect/src/test/resources/delete_zone_changes.json
new file mode 100644
index 0000000000..ac7b70f49d
--- /dev/null
+++ b/labs/dynect/src/test/resources/delete_zone_changes.json
@@ -0,0 +1 @@
+{"status": "success", "data": {}, "job_id": 275625520, "msgs": [{"INFO": "discard: 0 zone changes discarded", "SOURCE": "BLL", "ERR_CD": null, "LVL": "INFO"}]}
\ No newline at end of file