Club 3D HD3850, 256mb
Catalyst 7.12 drivers
LFS Patch Y
Win XP

I get AA and other quality options to work only if I choose 1680x1050 (16 bit). If I choose 32 bit I do not get any AA or AF.

Any ideas?

EDIT: OK, self help works, and search as well:
http://www.lfsforum.net/showthread.php?t=24971
http://www.lfsforum.net/showthread.php?t=18216

Seems to be a known problem with ATI drivers.