I have been having some issues recently when I open up my MBA and have it wake from being asleep. I recently set the password for when you wake from sleep or from the screen saver. I feel like I have been noticing them more though after the 10.5.4 update though. Any ideas on this. Edit: reread my post an realized I never said what happens. Basically the screen stays black without the password window. Usually I can just close the lid wait a second and re-open it and the password window will pop up.