I bought a macbook on 5/31. The day after I bought it, I put a DVD in and couldn't eject it until yesterday. I've read alot of problems about the supredrive doing that. It now makes a buzzing sound when I put a disc in, is that normal, I've only put one in and it wouldn't eject, so I don't know what normal sounds like. Also, when I shut down yesterday, the eject sign appeared on the screen briefly, but then the computer took about 10 sec to shut down, after the icons left and there was a blank screen. It's also crazy hot, way too uncomfortable. Applications are working fine though. Should I take it back and have an exchange? Will they?