Closed Issue: problem with IE8 onclick event not getting attached to controls inside tabs? [23226]

I have quite a few .net forms that use the tab control for navigation. Inside each tab I have forms that have asp:buttons to submit data as a postback. IE8 is the only browser where they onclick event does not get added to the button, in each case the button simply does nothing. Every other browser works fine. Running .net framework 3.5 sp1, VS2008 SP1, ajaxcontroltoolkit dll is latest stable from site released June 2009.