call Apple.
This machine is under warranty and should not be doing this.
They will "probably" get you to re-install the OS, using the Archive and Install option, but tell them anyway
P
Hi
I am on a brand new 3.06 GHz iMac. Installed Snow Leopard, 10.6.1. In general I don't experience any of the problems other people seem to have. But twice now my screen has turned blue while I am in the middle of something. All the open apps disappear and the Finder seems to relaunch. It only takes a few seconds. I don't have steps to reproduce it. Both times I had several apps open and had video/DVD running in the background.
Has anybody seen this?
I am a notorious file-saver which means I haven't lost much work through this but if it keeps happening I might have to go back to Leopard.
Thanks
Peter

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic