Hi. I've recently spotted some black/grey smears on the cover of my MB White (early 2008). There were no explosions, no smoke from the inside, but this smears look like something burned in the display cover. Link to the picture of my computer: http://img693.imageshack.us/img693/4608/80761684.jpg I've tried to find out what it might be, but i can't find any answer. I hope that You will be able to help. I would apreciate that. PS No. This is not dirt. I've tried cleaning.