Ok, so approximately late december, early january, my laptop started to randomly glitch. In a nut shell, i was working on my computer and I opened a window, and right when the window opened, my screen went mosaic (see photo below). I could still see my mouse ontop of the mosaic mess, and when I hovered over stuff like my bottom bar (don't know the technical name), I could see the mosaic change as the icons magnified. Even growl notifications cause the bottom mosaic to go dark as the notice appears. I rebooted and thought it was just something stupid. And sure enough, life was good for a while. I'm not sure how long after, but it was a decent amount of time... it sort of happened again... only this time it was only a part of the screen that went mosaic. This time, my computer locked up for 15-45 seconds, then would work normal for another 30 seconds, then lock up again. it would repeat this until I forced it to reboot. Within the past couple months, it seems as if it is more frequent. The only "event" i can seem to tie it to is it appears to happen more often when I plug in/unplug an external monitor, or if an external monitor is already plugged in. Something about that seems to trigger it. In fact, I am posting this right now because it happened again (and I took a pic below) right after unplugging from my external monitor. What sucks is that I don't know how to prove this to Apple other than pictures. Since the actual freezing of the machine doesn't cause it to crash, nor does the mosaic pixel patterns, I don't have any crash files to send to apple (and I've confirmed this). So... I have a macbook pro 17" santa rosa... is this a known problem? What should I do to get this looked at/fixed? I'm going to call apple again about it tomorrow. Edit: Just so you know, the only option apple has given me was to bring it in during the problem... my laptop is how I make a living, so I can't really stop working and drive out (or in this case drive out tomorrow) to an apple store to let them see it freaking out.