Using visual studio I opened the web site under the project:
Framework 2.0-Csharp-MicrosoftAjax.
If you add the test page to this project and click hide twice (hide – show) you will see that the browse button of the uploading stop working.
If I post back (adding dummy button for this purpose to the page), then the functionality of CuteWebUI:UploadAttachments is restored.
There is no problem using UploadType.IFrame, but obviously this is not a good solution.
I am using IIS 7, tested it on IE8 + FF 3.6. I also tested a release ver of WebApplication on our server.
Currently, I am holding back an upgrade of a system until I can see if we can solve this problem or we should go back to our original upload control.
Best Regards
tirza