I am experiencing the same problem as acomas and I just can't resolve it.  Can anyone confirm whether this control works inside a dynamically loaded user control rather than just a page object?

My problem is:
When I upload a file it gets stuck with 1 sec left on the progress bar and the FileUploaded routine never fires.  I have tested this in IE7 and Firefox 3 and it is consistent across both browsers.

I have put this control in a user control and load the user control dynamically when the default.aspx page is loaded.  Could this be the problem?  Do you not support user controls?

Any help in this regard would be greatly appreciated.  Did you manage to figure anything out Acomas?