I noticed that when I close the lid at night and open in the morning..my MBA boots normally as if it was shut down.. It made my outlook pst file corrupt 2 times... ( I use the outlook 2003 under parallels with XP ) As far as I know..closing the lid should make it sleep... It was like this..but now I guess its forcing shutdown... I checked the system preferences and couldnt find a place to change these settings... Thanks.