I had the same issue. After installing the plugin provided by Filipe, it was still getting the dialog.
I compiled this version for ubuntu 11.04 x64: http://dl.dropbox.com/u/24610398/gwt-dev-plugin.xpi -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/YkUCzVJtLcYJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.