The latest video card drivers from ATI are out and they fix the annoying issue with the Antialiasing. So, if you own an ATI card grab these drivers.

– Enabling AF to 8x and running the game Battlefield Vietnam with the graphics set to high and the display set to 1280×1024 32bpp no longer results in display corruption being seen at a certain point of the game

Ok, Fine… Here is the link.