what is wrong with my mac??? it is blurry and the dock arrows that tell you an application is open touching the bottom of the screen, and the apple menu at the top is touching the top of my screen, this only happens on my account. I think the root cause is a download I got at http://www.wikihow.com/Make-a-Greenscreen-on-a-Mac one of the instructions were restart, next thing I know is this. my mouse also moves to the top-right corner, which happens to be a hot corner.