I am afraid I too am getting this pop-up, and I think the problem may be related to the dreaded...
'about: blank' Virus
Here are a couple useful links on it:
Recent Problem Solving Discussion on the Virus at NT COMPATIBLE
Useful Recommendation for Removing this Virus from the NT Pros at Akadia
I also noticed that when I am on the
front page of HTF and I place the pointer on
"Control Panel" and then click on
"vB Home" - instead of sending me to the
home page which it used to, instead it sends me to
goto: home which appears to be a part of the about
: blank virus and redirects me to some randomly selected spam search engine.
This is a REALLY annoying virus and is not terribly easy to avoid or get rid of so be careful and do your homework! The semi-good news is that it does not appear to be a destructive virus... more like a nagging one.