[cd34]

Since I don't run Windows, I don't know. Urb has done a lot of research on this and could tell you. I beleive the javascript invocation still works though.

I think the thing that came up was that it blocked the referrers, it appears to block certain image sizes (which may correspond to the IAB units), and blocks things called from certain directories.

I'm sure there is some magic to the javscript, activex and other dynamic goodies that are filtered because you could easily break all mouseovers if you disabled javascript altogether. Videos wouldn't play if you broke some embedded commands, etc.