I'm experiencing some weird problems with my mac pro 3,1 under 10.6.1. Often, and with increasing frequency, I'll be using photoshop or final cut or something and suddenly the screen will fade to blue (the same blue you see before start up), all open apps (including finder) will suddenly force quit, and I'll be back at the desktop--no error messages or anything. The weird part is that all icons except safari and finder will be gone from the dock and I'll have to add them again manually. This is kind of a pain, especially since I lose all my work each time and it can happen in ten-minute intervals. Oh, and this may or may not be related: I installed some third-party ram (only at 4gb now, but I'll upgrade soon) and I used to have extremely frequent kernel panics until I reseated the ram. I don't have kernel panics anymore, but I may try reseating the ram, anyway.