I have a MacBook Air 1.6GHz 80GB HDD, I have found that the exhaust fan is running constantly at 6200rpm (according to iStat Pro). No applications are running at all. Before calling Apple does anyone have any suggestions? Thanks iMac (Aluminum) 20", 2.4 GHz, 4GB RAM, 500GB HDD Mac OS X (10.5.2) MacBook Air, 1.6 GHz, 2GB RAM, 80GB HDD