Does this happen to anyone else? I'm not sure if it has something to do with running side track.
Once in awhile, like after having my notebook on for about 2 weeks, I'll come home from work and my trackpad is virtually unuseable. When I try to move it around it jerks up and down and all over the screen. I even managed to log out once with this going on and it acted the same way on the login screen. Using the mouse when this occurs presents no problems and functions correctly.
If it's not happening to anyone else I would attribute the problem to Synergy (The Keyboard Mouse sharing App) or SideTrack.