I know somebody has the answer for this one. I have a late-model 1.33 GHz 17" PB. Works great, but somewhere in the last 3 months I've lost the ability to sleep from the energy saver settings in system preferences. By that, I mean that it sleeps fine if I close the lid or select "sleep" from the blue apple menu, but not if I just leave it alone until energy saver is supposed to time out and send the sandman. I've tried: --Resetting the PMU several times. --Fixing permissions. --Changing energy saver to sleep after 3 minutes. Display blacks out as it should, but no sleep. Tried it both on AC power and battery modes. --Changing energy saver to "never sleep", locking the setting, rebooting, unlocking it, then changing it back to some other time, locking it again, rebooting, noting that it still didn't work, blah, blah... --Creating a new admin account and changing energy settings from that account. Again, screen blanking follows the time I set on the slider, but no sleepy. --Searching for some power-related pref. Trashed a few, but no success. --Disabling any apps or daemons that looked like they might be trying to keep me awake (note: not sure I got 'em all--could still be the root cause). Done a few other futile things, too. I know it's gotta be an OS thing, but I was hoping to avoid reinstalling it as a last, desparate move. My PB is otherwise the best computer purchase I've ever made. Even this is just a very minor annoyance. Any and all suggestions appreciated.