When I scroll up and down in my Applications stack list (or any long list), it flashes all ugly like. It happens on both video cards - the 9400 and 9600. It does it in the Guest account as well. I'm starting to think that the cause of it is due to the battery's inability to supply the computer (or video cards) with enough power. It happens only when my 17" MacBook Pro is unplugged. Once I plug it in, the amount of flashies fades and after 5 or 6 seconds, the flashies disappear. Then, immediately when I unplug it, the flashies reappear. It happens on both the 9400 and the 9600. When I boot into Safe Mode (disabling Quartz Extreme) the flashies do not happen plugged or unplugged. Here's a video of the flashies: http://www.youtube.com/watch?v=kZfymT0Jexo Does anyone else's 17" Unibody MacBook Pro do this? I'm going to the Genius Bar on Friday about it, I'm just wondering if anyone else is experiencing this?