My SR MBP (summer 2007 model) had video issues and Apple exchanged a motherboard for me once. Since then, in over a year, it has happened a few times that the screen became blueish (is this called the blue tint problem?) Each time, the system returned normal after I rebooted the machine. Is it a good idea to send it to Apple and ask for an exchange of the motherboard? It seems that even Apple has exchanged the boards (are they refurbished ones?) for some users, video issues remain. If Apple exchanges for another board, that board could be worse. Any suggestions?