i recieve this error message once and day and have this line in my wallpaper. The line goes away if i open and close the lid. But im not sure why the error message. I have only had this 13" 2.4 for couple weeks and purchased it directly from Apple Store. If anyone has any ideas please let me know before i venture all the way out to my closest apple store. Thanks Also i am having major issues with all my web browsers crashing, ive tried Firefox, Safari and now Chrome.