I upgraded my new MBP from Tiger to Leopard right when it first came out, but only recently have I noticed/experienced a buggy problem that's beginning to frustrate me; I hope it's just because Leopard is a brand-new operating system, and not an isolated incident: My MBP will be running smoothly, until the mouse suddenly becomes annoyingly "choppy" and unresponsive; sometimes it will move violently and uncontrollably about, and the only way to stop this is by manually rebooting the machine (holding the power button down). Afterwards, everything works fine... until about 2 days later. I've had to repeat these steps about six times already. These issues occur for both my USB mouse and the trackpad; I have also repaired permissions, and that doesn't seem to be resolving the issue. Any insight or suggestions? This is driving me on the border of insanity, especially when it starts acting up right in the middle of lecture as I'm taking midterm notes! Thanks!