I have noticed many more pop-ups since I upgraded to Firefox 1.0 to take advantage of the security patch, which was not available for my .8 Firefox version. My V.8 version did an awesome job at blocking third-party ad pop-ups, yet didn't prevent the viewing of popups from the originating site. With FF 1.01, it seems to be an all or nothing gig. Either block all or block none. Were it not for the security patch, I'd dump 1.01 and return to .8, which seemed to have better built-in filtering without having to load a bunch of add-ins, bookmarklets or plug-ins to get it to behave like you wanted it to.