I figure these are the only computers that would have this problem, so I am posting in this forum instead of OSX. According to the Display preferences, I just lost a 1280*1024, and gained a half dozen 800*600 panels (whatever res it is supposed to be, it is sure small)? I took out one of my panels, rebooted, and still have an issue. If you are using multiple monitors, esp any tricks (I think what did me was a Tritton See2Xtreme to get the 1024*268 panel, I would wait until you have some time to troubleshoot to upgrade. MP 2.8 2x2600s.