Can't force AA in what games? There are some engines that simply cannot have AA applied to them as it breaks something else. The drivers will struggle to pass WHQL certification if they are known to cause problems with games, so forcing AA is disabled at driver level for that particular game. This is a Microsoft requirement and its not exclusive to ATI.......GTA 4 is a good example as neither Nvidia and ATI can force AA in that title. I'm confused as whether that could be described as gay or not, so I'll leave that to you.