Yes, it's adsafeprotected.com -- when I go to one of the many forums that load information from this domain or its "fw" and "pixel" subdomains, everything slows down within seconds and soon I get a pop-up box that tells me a script from that subdomain is running slowly, but when I try to click on any of the three options -- Continue, Stop Script, or Debug -- nothing happens. Task Manager then tells me that Firefox is using 90%+ of my computer's available memory -- it increases within a minute or two from 40% to over 90% -- and I have to shut down Firefox. I really like Flyertalk, but not enough to put up with this. (Incidentally, a Google search for adsafeprotected.com leads to several pages identifying it as a malware site originating in China.)