Submitting a FormPanel affect "back button" support

Hi,

I see http://code.google.com/p/google-web-toolkit/issues/detail?id=624 and at now I do not see any workaround that works on all browsers. I did an upload file that is similar at the gmail (use FormPanel and FileUpload), but the only problem that had is that when do the submit affect the history. I did a test and in gmail, of course works well, doesn't affect history.

Any know how can do an upload file that use FormPanel and FileUpload and doesn't affect history? If yes, I can reuse my code, if not I how I can do an upload file that doesn't affect back button support.

Thanks,
Juan

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