I have had my new iMac (27" 2.93GHz 8GB RAM) for 6 days and I experienced an interesting situation last night: The machine was asleep and it powered-on by itself. I wasn't sitting at/near it, I watched it turn on from across the room. Not waking, but a start-up sequence. I looked over surprised when I heard the Apple chime. I went to check on it a few minutes later and it was shut down... in which I thought it was asleep again... I specifically purchased this machine to work on photography and design projects... I guess it goes without saying these are critical projects and I can't afford losing work when and if the machine blinks out again. Could this have something to with the energy saver settings? I hope this is an isolated incident... but any help/suggestions are appreciated. Thanks.