Hey all. I have a 17inch intel core duo iMac. Lately, when i'm not messing with it, it just doesn't power down to sleep. Whenever I go to sleep, i usually have a quick playlist in itunes to play, then it eventually goes to sleep to whatever I have it set to in preferences. But lately it isn't doing that anymore. I wake up and my computer is still "on" so to speak (display is asleep, but its still on). I thought maybe I had programs running, so to test it i closed everything (safari, itunes, etc..even though thats never been a reason to stay awake). Still it doesn't go to sleep. Of course, if i actually put the imac to sleep, thats no problem. But i'm a bit concerned about this. Anyone help appreciated.