I'm new to OS X, just got a PB about a month ago and I'm noticing something strange with the cursor. Randomly it slows down or freezes for 5-15 seconds then is OK again. It seems I can get it working by Alt-Tabbing through open apps. Sometimes, it moves but very slowly (finger moves from one side of the trackpad to the other, cursor moves 1/4 inch). I've also wondered if this is related to overall CPU activity as it seems to happen more when multiple apps are open and running.
PB 15" 1G RAM 1.67Ghz OS X 10.3.8
Thanks,
Alan