This thread came up in a google search.
This couldn't have been fixed in a patch because I have this problem with latest version. I have a 6970 card and latest 12.4 drivers on a fresh windows 7 install. If I enable anti aliasing to ANY degree in the game, I get horribly pixellated foliage (grass, trees, etc). If I disable AA, the pixellation is removed, but the game is awfully jaggy :\
Yes I realize this is an old thread, but I believe it's still relevant and I see no reason to start a new one.