>>Ok, I reproduced it. I have the main UT window opened, then gmail tab, then ASP.NET forums tab. Nothing else opened IE related.
>>
>>I then have another UT thread opened close to the main UT tab with a thread. If I click to close this tab only and then try to switch back, I got UT not responding and have to close IE. Same thing seems to happen when I try to close a tab opened from another tab (still opened) from gmail.
>>
>>See if you can reproduce this scenario.
>
>Still works OK for me. Are you talking about the forums.asp.net forums (my assumption), or are you talking about UT ASP.net forum?

The tabs I have are

UT|Gmail|http://www.asp.net/

I need to run soon, will continue tests tomorrow.