Not that this helps you resolve your issue, but the GWT applications I maintain have no issues when uploading files in IE8 land. Something about how you are handling things is likely unique. Post some code and, as others have mentioned, a bit more detail about what exactly is happening.
-Ben -- 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/-/0-hM9_iCRRsJ. 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.