We are using Asp.Net version 3.0.0.0 of teh CuteWebUI.AjaxUploader on several pages on our site. One page is loaded in an iFrame and displayed in a div styled like a modal dialog. The page that is loaded in the iFrame has a asp:DropDownList, and a few asp validators. The page works fine in all browsers except FireFox 25.0.1. When the iFrame/div ...

I am experiencing the same thing.  In FireFox, I have AjaxUploader in an iframe that is contained inside an ajaxToolkit:TabPanel.  The Upload button stays gray/inactive.  The CuteWebUI_AjaxUploader_OnInitialize event does fire, but the button remains grayed out.  If I navigate to the uploader page (outside the Iframe) ...