I'm having a problem I have seen on the forums before. My cursor jumps constantly while I'm typing. It does not happen all the time, but when it does, it's nearly unusable. I have tried resetting the mouse sensitivity and downloading the touchfreeze fix. It happens when I'm plugging in and not, it happens with and without an external mouse, it is definitely not a stray mouse swipe. I have tried rebooting, re-seating the cover, updating the firmware. Any other ideas???