Hi, My white MB is too new to freeze up Yes, it's been 3 days, my MB keeps freezing up when I'm surfing via firefox and/or safari. Everything freezes up, I mean everything. I have to power off. In the last 10 min, it freezes twice already. How irritating!!! Also, the trackpad seems to move slower & not very smooth. I just installed 4GB 800MHz RAM (it recognizes as 800MHz) Please help. Thanks so much.