>I'm Beta testing the new MSN toolbar (http://toolbar.msn.com) and when I clicked on a link that someone included in their post, the MSN toolbar thought it was a popup and blocked it. Of course I added the UT to the "do not block" list, but I'm curious what the UT software does when a link is clicked. I'd like some information I could send in to the MSN toolbar people.

MSN thinks that this new window is a popup ad and it disables it. That's why you need to enter the UT domains in the list of MSN toolbar so it won't act on it.