The strangest thing is happening on my MacBook Pro 13" with Lion downloaded 3 weeks ago. After keeping the computer sleeping a longtime, the monitor is blurred in dark grey and the mouse pointer, if activated, creates a streak of the same colour all over the monitor. When I enter the admin pwd the monitor slowly takes on the original colour and brightness and all is back to normal. Happens quite frequently and very bothersome.--I have the same problem on my iMac 24" (Lion downloaded at the same time). I therefore assume it is smthg linked to Lion. Does anybody know what this is and how to cure it?