Hello. I am having a serious issue with my MacBook since upgrading to Mac OS X Snow Leopard. My MacBook (Late 2008 Aluminum, 2.4 GHz) will not go to sleep automatically anymore. If I select "Sleep" from the Apple menu it will sleep fine. However, it will not sleep according to my Energy Saver preference pane which says sleep at 1 min each (Display and Computer). Another thing to keep in mind is that my display sleeps perfectly normally. However, the computer itself will not sleep. Here are the things that I have tried so far: Reinstall 10.6.2 combo updater Remove Energy Saver preferences and entire System Configuration folder Made sure that no hardware or software is interrupting sleep Reset PRAM and SMC Repaired Disk Permissions Archive and Install I am running Mac OS X 10.6.2 with ALL updates and firmware installed. Please help me figure this out as it is a serious issue. Thanks.