Malware Problem with Specific Website

I've been directed here by a fellow poster, so apologies if I have misread the rules (read the Malware removal guide, and the FAQ).

Here's the problem - I go to a Fantasy sports site (http://forums.rotoworld.com), and I have a problem with that specific site only - I get a script warning that says:

Do you want to terminate this script?

A script is causing IE to run slowly. Running it may cause your computer to become unresponsive.

It doesn't say what it is, or what it does. I must click a choice to get to the website. I have contacted the Admins there, and they don't report specific problems. The problem now happens on my desktop and networked laptop. It does *not* happen on any other website, strangely enough.

Run WinXP, IE7 usually use SD S&D, AVG 8.0 (updated daily), and just ran Ad-Aware. They cleaned up some adware but nothing too suspicious. I tried using Mozilla, and while there is no script box, the site just freezes after a couple of links are clicked. The problem still exists. It wasn't happening before today, the site is very mainstream for sports fans, and hasn't encountered any problems that they know of, so I have to believe malware is at play, and the RW Admins have suggested I try you (as did my friend).

At my friend's advice, d/l Hijack This, and I've attached the Notepad file. At his suggestion, I'm posting now, and did not make any fixes. Sorry if I can't provide more info, but that's all I have. I thank you in advance for this great service, your help is most appreciated.