With the latest patch of WoW, Blizzard have decided that SSAA isn't an option anymore, even though this was the absolute best antialiasing option available. So, I tried the AMD Radeaon Settings which should allow me to override the games antialiasing setting, but of course this did not work. In fact, it had absolutely no impact on the antialiasing settings. :-(
So, is this a bug in the AMD driver?
It does offer the option, but the game is unaffected.