On FireFox 21.0 it works fine.
Last night, version 22.0 was released, and now all pages with a AsyncFileUpload control gets the "Unresponsive Script" popup.
I'm trying to recompile with the new June release, but having a hard time getting the new events/properties of the control to show up in the IDE (like StoreToAzure, and UploadStart event)
I have customers complaining about the our site while using FireFox.
If I can't get this to work, I guess I'll have to rewrite the pages and use another File Upload.
If you go to the Sample Site: http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/AsyncFileUpload/AsyncFileUpload.aspx using FireFox version 22.0, it gets the Unresonsive Script error, too.
Does anyone have any ideas??
-Scott