From the users stand point; it just gets jumpy; and your input doesn't match the output. http://www.youtube.com/watch?v=8ak20j48w1A http://www.youtube.com/watc

From the users stand point; it just gets jumpy; and your input doesn't match the output. http://www.youtube.com/watch?v=8ak20j48w1A http://www.youtube.com/watch?v=8ak20j48w1A If you have ever used a non-laser tracking mouse on a wood surface you have a good idea of what its like. What appears to be happening is that there is a short from the output of the touchpad to the motherboard. Removing the little piece of foil that appears to be 'grounding' the trackpad from the screw 100% fixed it (for me).