Its nice when my ibook 'goes to sleep' quickly, as in almost immediately. This is usually for a short time after installing a system upgrade. Its such a shame that it 'reverts' to its usual sluggish 30 second or more delay in sleeping after a while. Today, for apparently no reason, it's decided to go into its 'fast sleep mode', if such a thing exists. This is *a good thing* and i'd like it to be like this all the time (as its boring waiting around to check if it has bothered to or not)! Anyone sussed out what causes the delay in sleeping and how to fix it ?