I've been dealing with the SAME EXACT PROBLEM for the last two months. After back and forth with AppleCare for over a month, and replacing the logicboard, it was still happening! I finally got them to send me a new one. It's been fine for a couple days, and now just started happening again. I searched google afterwards and found this post. I don't know what to do at this point. For example, on yahoo's homepage, if you keep clicking the right arrow to go through the different stories... there will be flickering from the previous photo that was on there. Is this the same issue? Also sometimes in text boxes, the cursor and the last couple letters I typed will temporarily dissapear. I guess this is what happens when you buy new technology right when they it comes out, but still there's no excuse. I'm having my old laptop sent straight to an Apple Engineer, because Apple claims they've "never seen this issue before". It's honestly been a huge headache for the past couple months, not sure what to do at this point. The only things I brought over from my original computer were about 30 Word documents, and my pictures that were previously uploaded from my iPhone.
Anyone else out there have the same issues, or know a fix to this?