>>My point was that MSN thinks this is a popup when it really isn't. The Google toolbar doesn't think it's a popup. I think it's a bug in the MSN toolbar and I wanted to add more information to my bug report.
>
>AFAIK, some users had to set it up for Google as well.

This afternoon I installed the Google toolbar on a "clean" machine and tested clicking on a link in a UT post. The popup was not blocked.

We may never know why the new IE window works with one and not the other.