I have noticed that even with my Battery power settings set to sleep at 15 min, that the machine doesn't ever actually sleep, when the lid is open. I will wake up in the morning and try to use it, and it will be completely dead. When I plug power back in, it restores from the hibernate status. I believe that Logmein and Better Touch Tools are running in the background, oh and **iStat**. Could these be the culprits? I checked the Console logs and didn't see any error messages indicating sleep prevention. ** Edit ** - It may be the USB card reader I left plugged in?