I don't know, I ran Ad Aware a few weeks ago and it didn't find anything, zip, nada. I don't run a specific popup killer, but I've been using Proxomitron as my proxy server for years. I basically leave it at the defaults because it can get complicated with its own scripting and all. It's smooth as silk with IE 6 (I'd run into trouble sometimes switching it off and on with IE5 and earlier) and the only problem I have is that I have to tell both Proxy and IE when I want to allow a cookie. Still haven't figured out how to save a cookie at RDNA though.