ive also noticed that the mouse pointer is sluggish, suggesting a low fps, in the ingame UI. especially the main menu that appears when you start the game and when you press ESC.
fine during the actual game from what ive seen.
i tried forcing x4AA in the catalyst control center globally for all applications. dont think it worked - some things looked like they might have been having AA applied (users character) but other things like trees had nothing on them.