Anti-aliasing seems to work on my 5900 128mb card just fine.
"The large print giveth, and the small print taketh away." - Tom Waits
Athlon XP 2100+ | 512MB PC3200 RAM | Asus A7N8X Deluxe | GeforceFX 5900 VIVO 128MB @ 475/950 | 2 Western Digital SATA 120GB HDD in RAID 0 | 1 IBM 60GXP 60GB HDD IDE | 36x 12x 48x CD-RW | Logitech Z-680 THX 5.1 Speakers | 19in. Samsung 955DF Monitor | Windows XP Pro