Sometimes when i use my mouse on the Macbook the cursor will disappear especially at the top left corner of Sarfari, but if you move it around it comes back. anyway that wasn't the issue, i was using the computer normally and all of a sudden the mouse cursor started moving gradually down and to the right on its own. I could use it with on finger but when i took it off i would still move down and to the left on its own, two fingered scrolling was unusable. i logged of, same problem. restarted, repaired permissions, and booted in windows and it was still doing it until i logged off windos and restarted. STRANGE,