I just noticed while my iMac was asleep in a completey dark room that there is a very subtle light I can see in the center of the chin, about 1 inch right and one inch down from the Apple logo. I do not mean the sleep light which pulses away at the far right, I'm talking about another very faint light just beside the Apple logo. If the room is completely dark I can see THROUGH the white plastic and see a metal grill patern behind it. If i turn the iMac completely off the light is still there. The only way to get the light off is to switch the plug off at the wall. Does anyone else with a 24" iMac see the same thing. It's very very subtle so you'll have to be in a competely dark room to check.