My powerbook (brand new combo drive just picked up last saturday) is having a few issues. Not too long ago the expose corner I set to view all of the different windows stopped working. I have the desktop set for 5 second random rotation of the abstract folder. When I finally closed out of everything and worked back down the desktop it had the middle of the screen frozen in the rotation with the next desktop picture surrounding it. Sorry if that doesn't paint an adequate picture. I tried restarting it, but it didn't shut down, so I had to hold the power button. I started it back up, and after about 2 minutes the same thing happened. Does this sound like an overheating problem, or something else? I mean, my powerbook is a little on the warm side, but no where near what I've heard of previous revisions, and the fan wasn't even kicking in yet. Combine this with my intermittently functional latch, and I'm not stupendously pleased with my first mac thus far. Please tell me I'm missing something simple.