I have a 2010 11´MBA. Every time I open it from sleep, the screen goes on, then it goes off for a few seconds, then it goes on again, and everything runs fine. Is that normal? I´m not sure, but when it was new, i did not noticed... It came with SL and now with Lion, no difference. EDIT: Repairing permissions did the trick. Now it does not happens anymore. EDIT 2: it´s happening again!!