I have tried everything that I know to try and figure out what the problem is and can't find anything! The restart always occurs when I am browsing and interacting with ebay on any browser (tested on FireFox, Safari, and Chrome with a restart occurring in all 3) The screen slowly gets covered by a light grey over layer and displays a message telling me that there has been a problem and that I need to hold down the power button to restart my macbook. this has been happening to me for the past 3 weeks and I can't stand it anymore. Any suggestion on how I might be able to find a solution to the issue? Also, has this happened to anyone else out there? I am running Snow Leopard 10.6 on a 2009 macbook. Thanks for your help guys!