Oh...is vertical sync set to on or off in the game options?
If its set to off, turn it to on. You might be getting too fast a frame rate anyway to bother turning off this setting. Try that and see if you dont get any break up
Yeah, because that would cause breakup, as if it is breaking up into small lines if your video card is rendering so much faster than your monitor can handle (60hz, 70hz usually). Its worth a try and if you turn it on, your frame rate will drop to your montiors refresh level, though this would be fine for any game and give smooth playback, since you could be getting 100-200fps for example and it'd be too fast to see
lol i notice breakups all the time because disabled VSYNC on CSS and my LCD monitor is only capable of like 75hz. and im making over 90+ most of the time.