My powerbook trackpad has been messing up, and acting funky. When I woke it up from sleep, the trackpad was VERY jumpy. I would move it, and then it would immediately snap the arrow to the upper right corner of my screen. I couldn't do anything with my cursor, because every time i moved it, it snapped back. Has anyone else had this problem? It has happened to me before, but this time concerned me, because I played with it for a few minutes, and it didn't stop (like it usually does). I had to close the lid, let it go to sleep, and open it back up before it worked again. Has anyone had this problem? Does anyone know how to go about fixing it, or what is wrong?