diff --git a/VERSION.txt b/VERSION.txt
index 9b92b028e63..bc5db5fb071 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -25,6 +25,7 @@ jetty-7.3.0-SNAPSHOT
  + 333679 refactor jetty-jmx to support the OSGi PAX tests.
  + 334062 It should be possible to embed in the jetty.home.bundle the ssl keystore files
  + 334229 javax-security needs to import the package javax.security.cert in its OSGi manifest
+ + 334311 fix buffer reuse issue in CachedExchange
 
 jetty-7.2.2.v20101205 5 December 2010
  + JETTY-1308 327109 (re)fixed AJP handling of empty packets
diff --git a/jetty-client/src/main/java/org/eclipse/jetty/client/CachedExchange.java b/jetty-client/src/main/java/org/eclipse/jetty/client/CachedExchange.java
index c36cb6834d3..9885925c0b6 100644
--- a/jetty-client/src/main/java/org/eclipse/jetty/client/CachedExchange.java
+++ b/jetty-client/src/main/java/org/eclipse/jetty/client/CachedExchange.java
@@ -60,7 +60,10 @@ public class CachedExchange extends HttpExchange
     protected synchronized void onResponseHeader(Buffer name, Buffer value) throws IOException
     {
         if (_responseFields != null)
-            _responseFields.add(name, value);
+        {
+            _responseFields.add(name, value.asImmutableBuffer());
+        }
+        
         super.onResponseHeader(name, value);
     }
 }
diff --git a/jetty-client/src/test/java/org/eclipse/jetty/client/CachedHeadersIsolationTest.java b/jetty-client/src/test/java/org/eclipse/jetty/client/CachedHeadersIsolationTest.java
new file mode 100644
index 00000000000..595f7d818a9
--- /dev/null
+++ b/jetty-client/src/test/java/org/eclipse/jetty/client/CachedHeadersIsolationTest.java
@@ -0,0 +1,117 @@
+package org.eclipse.jetty.client;
+
+import java.io.IOException;
+import java.util.Enumeration;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import junit.framework.TestCase;
+
+import org.eclipse.jetty.client.CachedExchange;
+import org.eclipse.jetty.client.HttpClient;
+import org.eclipse.jetty.http.HttpStatus;
+import org.eclipse.jetty.server.Connector;
+import org.eclipse.jetty.server.Request;
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.server.handler.AbstractHandler;
+import org.eclipse.jetty.server.nio.SelectChannelConnector;
+
+public class CachedHeadersIsolationTest extends TestCase
+{
+
+    Server server;
+    HttpClient client;
+    int port;
+
+    @Override
+    protected void setUp() throws Exception
+    {
+        super.setUp();
+        server = new Server();
+
+        Connector connector = new SelectChannelConnector();
+
+        server.addConnector(connector);
+
+        server.setHandler(new AbstractHandler()
+        {
+
+            public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException,
+                    ServletException
+            {
+                response.setStatus(HttpStatus.OK_200);
+                response.addHeader("For",request.getQueryString());
+                response.addHeader("Name","Value");
+                response.getOutputStream().print("blah");
+                response.flushBuffer();
+            }
+        });
+
+        server.start();
+
+        port = server.getConnectors()[0].getLocalPort();
+
+        client = new HttpClient();
+        client.setConnectorType(HttpClient.CONNECTOR_SELECT_CHANNEL);
+        client.setConnectTimeout(5);
+        client.start();
+
+    }
+
+    @Override
+    protected void tearDown() throws Exception
+    {
+        super.tearDown();
+        server.stop();
+        client.stop();
+    }
+
+    public void testHeaderWhenReadEarly() throws Exception
+    {
+
+        CachedExchange e1 = new CachedExchange(true);
+        CachedExchange e2 = new CachedExchange(true);
+
+        e1.setURL("http://localhost:" + port + "/?a=short");
+        e2.setURL("http://localhost:" + port + "/?a=something_longer");
+
+        client.send(e1);
+        while (!e1.isDone())
+            Thread.sleep(100);
+
+        assertEquals("Read buffer","Value",e1.getResponseFields().getStringField("Name"));
+
+        client.send(e2);
+        while (!e2.isDone())
+            Thread.sleep(100);
+
+        assertEquals("Overwritten buffer","Value",e1.getResponseFields().getStringField("Name"));
+    }
+
+    public void testHeaderWhenReadLate() throws Exception
+    {
+
+        CachedExchange e1 = new CachedExchange(true);
+        CachedExchange e2 = new CachedExchange(true);
+
+        e1.setURL("http://localhost:" + port + "/?a=short");
+        e2.setURL("http://localhost:" + port + "/?a=something_longer");
+
+        client.send(e1);
+        while (!e1.isDone())
+            Thread.sleep(100);
+
+        client.send(e2);
+        while (!e2.isDone())
+            Thread.sleep(100);
+
+        for ( Enumeration<String> e = e1.getResponseFields().getValues("Name"); e.hasMoreElements();)
+        {
+            System.out.println(e.nextElement());
+        }
+        
+        assertEquals("Overwritten buffer","Value",e1.getResponseFields().getStringField("Name"));
+    }
+}
\ No newline at end of file