As the title says, my cursor is sometimes moving by itself. I've been researching, but it seems that the most common problem is when the cursor slighty move up or down the screen when you're not even near it. It's not like that in my case thought. Somehow, while I'm working, the cursor suddenly gets out of control. It's like another person is moving the cursor, while I'm desperately trying to fight back. I've tried leaving it, just to see what happens, but it only jumps around and randomly right clicks on things. It goes back to normal again if I close the mac and open it again, but only for a short while. Any ideas?