Commented Issue: TabContainer throws exception in user control with Nov release [27053]

A user control contains a tabcontainer. When aspx page loads, the user control is not visible. Ajax toolkit script function tries to set focus on tabcontainer and it throws exception : "Can't move focus to the control because it is invisible, not enabled, or of a type that does not accept the focus."

The problem occurs in IE 8 with 11/16/2011 release. It worked OK with sept. release.
Comments: i have downloaded the AjaxControlToolkit.Binary.NET4.zip. i am unable to find file File: Client\MicrosoftAjax.Extended\Tabs\Tabs.pre.js can you please tell me how to modify this. Thanks.