Originally posted by fancypiper
What happens with ctrl-alt-<numpad +>? If it won't change, I would re-configure and test the X server with different settings until you get what you want.
I'm reinstalling now... I'll tell you what happens.. I have a hunch it's because I have both of my monitors plugged in to the video card's dual head outputs. I've unplugged the secondary monitor in hopes that it grabs the correct dimensions in the new reinstall...