Recently and after installing Leopard Ive noticed that when i set my computer to sleep by closing the mbp, and then waking it from sleep by opening the mbp the screen no longer displays anything it i completely blank. The HD and computer itself appears to be running but nothing is displayed on the screen the only way to fix this is by force shutting down and restarting the computer anyone have any similar issues if so is there any way to fix it. It is very frustrating because now i must shut my computer down everytime im not using it.