On Monday I bought a new MacBook from the Apple store. When I started it up, I noticed the trackpad wasn't working properly - when using the trackpad the mouse would often jump out of position, and move about to places I wasn't directing it. I took it back to Apple that day, and I got a replacement. But the replacement is also doing the same thing - just not as bad. I don't know what to do - is anyone else experiencing this problem? Do you think it'll be fixed with 10.5.2? The problem is quite subtle and it happens sporadically so I can't just recreate it. I have tried changing all the trackpad preferences in Leopard with no luck. Should I take it back to Apple for another replacement?