>I don't have any other utility, that I know of, that blocks pop-ups. I use IE 6.0 SP1. And it is possible that something is installed in the browser that is causing the problem. But I don't know how to find out if there is such a plug-in and how it works.

Nadya mentioned that she had to put UT in the list of filtered domains that her ISP was using in regards to those popup blockers. Are you using something similar?

If that is the case, note that you would have to add it to levelextreme.com, utmag,com and levelextreme.com.