Anti-Aliasing issues

My apologies if this was previously asked and answered. I was unable to find anything on the subject.

I've recently purchased a GeForce fx 5200: 256 mb. Everything works fine, but when I try to adjust the anti-aliasing settings in the Graphics pane within GW, the screen appears to stretch twice as wide. The center of the screen is now flush with the right edge of my monitor's viewing area. So basically it appears as if it's a widescreen movie, if you will. When I turn anti-aliasing off, it goes back to normal. By all means, this isn't a real issue; I can just have anti-aliasing off. I'm just wondering why that might happen.

Thanks ^^

Happens on my laptop with the go 5200 and a 17 inch widescreen. In the nvidia control panel alternate between application controlled anti-aliasing and x4 or x2 and it should right itself. Everytime you change the setting though it can do the stretching thing again, which makes it hard to click on the buttons in game and such. Lately though i can only get it to work on either the 2x or 4x modes (can't remember which at the moment)