I have a late 2008 15" MBP, and I often leave it playing videos while I go to sleep. Lately, it's stopped sleeping the display and/or going to sleep (depending on whether something's downloading in the background) after the video is finished, which is quite annoying as the screensaver's glare normally wakes me up in the middle of the night (and it's probably not too good for the display either). Before a few weeks ago, it would quite happily sleep the display a few minutes after the video (in Front Row or otherwise) finished playing, but it's now consistently ignoring the sleep and display sleep settings (which are all correct). I even set the display sleep timer to 1 minute, waited without anything happening in the background, but nothing happens. Anyone have any idea how to get the timers to work again? Thanks!