If, while working with GWT hosted mode, the browser just hangs while loading the application, check the server logs for the following error:

 [SPAM] EXCEPTION

 org.mortbay.jetty.HttpException: null

        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:276)

        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205)

        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)

        at org.mortbay.io.nio.SelectChannelEndPoint.run

 (SelectChannelEndPoint.java:395)

        at org.mortbay.thread.QueuedThreadPool$PoolThread.run

 (QueuedThreadPool.java:488):50250/Test.html

The solution is to rename your ~/.mozilla/eclipse/ directory, then it should work fine.