Ok...I have posted and replied about sleep before. But this is a new one. For one or more of the following reasons, my Dual G5 machine will not fall asleep. I can put it to sleep through the apple menu, but it won'd fall asleep as I have set it up to through the Energy Saver system pref. Latest QuickTime and OSX security software updates: I ran the software update last week, after a couple months of updating, and these were installed. Screensaver download: Downloaded some funky liqifying screensaver as recommended by cNet. Removed this after I suspected it might be why I won't fall asleep. MPlayer download: Installed this app for playing all sorts of video formats. Again...trashed this in expectation that it might be giving my machine some uppers, forcing it to stay awake. These are the only three things I have done differently that might have caused this. It was working fine before all of this. Any advice and ideas would be GREATLY appreciated. Thanks!