Friends, My Father succumbed to my wife's Apple zealotry about four months back and purchased an iMac i7. He is an avid Photographer with a need for crunching power because of the movie making aspect of it. The upshot of it is, he's on his fourth iMac now after five months of servicing. Problems have ranged from bad motherboards, to bad bluetooth. Apple has been supportive but there have been long spans in-and-out of the shop and time is money. He's still waiting for the latest machine to be sent to him. IMHO Apple is having some severe growing pains and, reading other threads, this problem may be endemic.