KingOfKong said:
Yep I can't get rid of it on mine either. Its like a strip of tearing...its really bizarre.
Tearing happened like this on my ATI card until I forced vsync with +r_swapInterval 1 on the launch options. After the patch, it was not necessary anymore (the game defaults to +r_swapInterval 2 now, which is "smart" mode).
The differences between the options seem to be that if the game does not run at 60 frames, it will either stutter (drop to 30 fps) or tear (keep 60 fps, regardless if the rest can keep up), depending on which setting is chosen. (0 = tear, 1 = stutter, 2 = smart). Smart mode does the same as 1 (vsync on), but instead of dropping to 30 fps, it will tear instead. The latter option only works on some grafics cards, though.
You should try to force vsync on if you prefer to have slight stutters instead of the tearing or try to lower some other options so that the framerate does not drop below 60.