Hi, Just got a new pb 12 inch rev d. After booting up and about twenty minutes with nothing going but safari, adium and iTunes the fans kick in. When I look under activity monitor it seems fine: 10% "user" and 87% "free". Not alot of stuff going on but the fans are still going nuts...whats going on? Got any ideas!? Edit: I think it might be connected to my external drive. WD Passport. Powered through USB! Is this possible? Anyone with similar experiences?