Fixing bug 268844. Don't force the cache to be bypassed for non-multipart requests. r=bzbarsky@mit.edu, sr=darin@meer.net

extensions/xmlextras/base/src/nsXMLHttpRequest.cpp

@@ -1525,15 +1525,16 @@ nsXMLHttpRequest::Send(nsIVariant *aBody)
     if (!listener) {
       return NS_ERROR_OUT_OF_MEMORY;
     }
-  } else {
-    listener = this;
-  }
 
-  // Bypass the network cache.
+    // Bypass the network cache since caching makes no sense with
+    // multipart mixed replace documents.
     nsLoadFlags flags;
     mChannel->GetLoadFlags(&flags);
     flags |= nsIRequest::LOAD_BYPASS_CACHE | nsIRequest::INHIBIT_CACHING;
     mChannel->SetLoadFlags(flags);
+  } else {
+    listener = this;
+  }
 
   // Start reading from the channel
   ChangeState(XML_HTTP_REQUEST_SENT);