Why are these pop ups happening?
 

Why can't I spell why?

That was weird don't know if anyone else even saw it, but something was wrong with cybersexhounds link to fetishhits in his sig.
It was causing a popup login to webmaster stats at fetishhits.
In every thread he posted in.

Guess either he or an admin caught it for I see his sig and the broken image link is gone now

What is your browser again?

I use ie6...the link showed as a broken image in his sig...served by fetish hits in fact..and as I had said every thread he had posted in was popping up the log in box

He was pulling an image in his sig from a password protected directory.

On the other hand... He may have hotlinked a sponsor banner which is located in the sponsor's member area. So when your browser tried to download the file the authentication dialog popped up and asked you for username and passwords. Could that be an answer?

OR it could be something worse. For the interested souls, please contact me on ICQ :)

Thanks to both of you, makes sense