the other day i lifted the lid on my MBP to find half the screen covered in a corrupted grey mess... first reaction was "oh ****" but it promptly sorted itself out. last night i noticed wired white flashes going across the screen out of the corner of my eye whilst i was doing something on my main display. however it only happened when i kept the mouse button pressed down. now today i was watching a video on line on some streaming site and the laptop screen went mental. http://www.youtube.com/watch?v=HH46ZHF4JMM check that **** out, it starts at 20 seconds in and gets progressively worse. strange thing is, i stopped watching the video and now its just fine. what could cause that? overheating? maybe the video card was having to use an infrequently used part of its logic for the video decoding and that logic is FUBAR? the latest 1.3 EFi update that supposedly fixed an issue with the screens? recently replaced battery?