diff --git a/jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannel.java b/jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannel.java
index 0ce0a5be660..0187179ca7b 100644
--- a/jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannel.java
+++ b/jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannel.java
@@ -315,7 +315,10 @@ public class HttpChannel implements Runnable
                     else
                     {
                         error=true;
-                        throw e;
+                        LOG.warn(String.valueOf(_uri), e);
+                        _state.error(e);
+                        _request.setHandled(true);
+                        handleException(e);
                     }
                 }
                 catch (Exception e)
diff --git a/jetty-server/src/main/java/org/eclipse/jetty/server/handler/RequestLogHandler.java b/jetty-server/src/main/java/org/eclipse/jetty/server/handler/RequestLogHandler.java
index 706b988bffc..6faa3261ddb 100644
--- a/jetty-server/src/main/java/org/eclipse/jetty/server/handler/RequestLogHandler.java
+++ b/jetty-server/src/main/java/org/eclipse/jetty/server/handler/RequestLogHandler.java
@@ -66,6 +66,9 @@ public class RequestLogHandler extends HandlerWrapper
         @Override
         public void onError(AsyncEvent event) throws IOException
         {
+            HttpServletResponse response = (HttpServletResponse)event.getAsyncContext().getResponse();
+            if (!response.isCommitted())
+                response.setStatus(500);
             
         }
         
@@ -91,6 +94,12 @@ public class RequestLogHandler extends HandlerWrapper
         {
             super.handle(target, baseRequest, request, response);
         }
+        catch(Error|IOException|ServletException|RuntimeException e)
+        {
+            if (!response.isCommitted() && !baseRequest.getHttpChannelState().isAsync())
+                response.setStatus(500);
+            throw e;
+        }
         finally
         {
             if (_requestLog != null && baseRequest.getDispatcherType().equals(DispatcherType.REQUEST))
diff --git a/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/AsyncGzipFilter.java b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/AsyncGzipFilter.java
index 9097aa47b50..48df10cc280 100644
--- a/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/AsyncGzipFilter.java
+++ b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/AsyncGzipFilter.java
@@ -130,6 +130,7 @@ public class AsyncGzipFilter extends UserAgentFilter implements GzipFactory
     private static final Logger LOG = Log.getLogger(AsyncGzipFilter.class);
     public final static String GZIP = "gzip";
     public static final String DEFLATE = "deflate";
+    public final static String ETAG_GZIP="--gzip";
     public final static String ETAG = "o.e.j.s.GzipFilter.ETag";
     public final static int DEFAULT_MIN_GZIP_SIZE=256;
 
@@ -364,9 +365,8 @@ public class AsyncGzipFilter extends UserAgentFilter implements GzipFactory
         String etag = request.getHeader("If-None-Match"); 
         if (etag!=null)
         {
-            int dd=etag.indexOf("--");
-            if (dd>0)
-                request.setAttribute(ETAG,etag.substring(0,dd)+(etag.endsWith("\"")?"\"":""));
+            if (etag.contains(ETAG_GZIP))
+                request.setAttribute(ETAG,etag.replace(ETAG_GZIP,""));
         }
 
         HttpChannel channel = HttpChannel.getCurrentHttpChannel();
diff --git a/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/AbstractCompressedStream.java b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/AbstractCompressedStream.java
index 6808c439e83..fc5b8bf978b 100644
--- a/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/AbstractCompressedStream.java
+++ b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/AbstractCompressedStream.java
@@ -255,7 +255,7 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
 
                         String etag=_wrapper.getETag();
                         if (etag!=null)
-                            setHeader("ETag",etag.substring(0,etag.length()-1)+'-'+_encoding+'"');
+                            setHeader("ETag",etag.substring(0,etag.length()-1)+"--"+_encoding+'"');
                         return;
                     }
                 }
diff --git a/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/GzipHttpOutput.java b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/GzipHttpOutput.java
index 3e41b51877e..bb77f37d5fc 100644
--- a/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/GzipHttpOutput.java
+++ b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/gzip/GzipHttpOutput.java
@@ -31,6 +31,7 @@ import org.eclipse.jetty.http.MimeTypes;
 import org.eclipse.jetty.server.HttpChannel;
 import org.eclipse.jetty.server.HttpOutput;
 import org.eclipse.jetty.server.Response;
+import org.eclipse.jetty.servlets.AsyncGzipFilter;
 import org.eclipse.jetty.util.BufferUtil;
 import org.eclipse.jetty.util.Callback;
 import org.eclipse.jetty.util.IteratingNestedCallback;
@@ -195,7 +196,7 @@ public class GzipHttpOutput extends HttpOutput
             response.setContentLength(-1);
             String etag=fields.get(HttpHeader.ETAG);
             if (etag!=null)
-                fields.put(HttpHeader.ETAG,etag.substring(0,etag.length()-1)+"--gzip\"");
+                fields.put(HttpHeader.ETAG,etag.substring(0,etag.length()-1)+AsyncGzipFilter.ETAG_GZIP+ '"');
 
             LOG.debug("{} compressing {}",this,_deflater);
             _state.set(GZState.COMPRESSING);
diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
index dfb2ee46bf1..02e3d8a2b67 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
@@ -23,6 +23,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.lang.instrument.ClassFileTransformer;
 import java.lang.instrument.IllegalClassFormatException;
+import java.lang.instrument.Instrumentation;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.security.CodeSource;
@@ -461,16 +462,43 @@ public class WebAppClassLoader extends URLClassLoader
     }
 
     /* ------------------------------------------------------------ */
+    /**
+     * @see addTransformer
+     * @deprecated
+     */
     public void addClassFileTransformer(ClassFileTransformer transformer)
     {
         _transformers.add(transformer);
     }
     
     /* ------------------------------------------------------------ */
+    /**
+     * @see removeTransformer
+     * @deprecated
+     */
     public boolean removeClassFileTransformer(ClassFileTransformer transformer)
     {
         return _transformers.remove(transformer);
     }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * @see addClassFileTransformer
+     */
+    public void addTransformer(ClassFileTransformer transformer)
+    {
+        _transformers.add(transformer);
+    }
+    
+    /* ------------------------------------------------------------ */
+    /**
+     * @see removeClassFileTransformer
+     */
+    public boolean removeTransformer(ClassFileTransformer transformer)
+    {
+        return _transformers.remove(transformer);
+    }
+    
     
     /* ------------------------------------------------------------ */
     @Override
diff --git a/jetty-webapp/src/test/java/org/eclipse/jetty/webapp/WebAppClassLoaderTest.java b/jetty-webapp/src/test/java/org/eclipse/jetty/webapp/WebAppClassLoaderTest.java
index 0e341fc2c9a..adf4e255e2a 100644
--- a/jetty-webapp/src/test/java/org/eclipse/jetty/webapp/WebAppClassLoaderTest.java
+++ b/jetty-webapp/src/test/java/org/eclipse/jetty/webapp/WebAppClassLoaderTest.java
@@ -97,7 +97,7 @@ public class WebAppClassLoaderTest
     {
         final List<Object> results=new ArrayList<Object>();
         
-        _loader.addClassFileTransformer(new ClassFileTransformer()
+        _loader.addTransformer(new ClassFileTransformer()
         {
             public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)
                     throws IllegalClassFormatException
@@ -109,7 +109,7 @@ public class WebAppClassLoaderTest
                 return b;
             }
         });
-        _loader.addClassFileTransformer(new ClassFileTransformer()
+        _loader.addTransformer(new ClassFileTransformer()
         {
             public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)
                     throws IllegalClassFormatException