MBP 15.4" Core Duo, 2Gb ram. Every now and then my MBP display freezes and then gets progressively scrambled and fades out to grey. Backlight stays on. If I reboot it's ok again. A very intermittent problem which seems to occur at random. Last week it happened twice in one evening (while running Parallels and an external monitor). Today it happened while running iDVD, no external monitor. Any ideas anyone?