Just added two Active MDP to DVI adapters to have three monitors once again. Now I cannot access the Desktop or Screensaver utility in System Preferences, it quits while trying to load. Works fine for one other user of the computer, she was able to normally reset and change the three desktop background images. Mine however hangs and quits. I've restarted numerous times. Tried to remove some extra images that we all use, but now I can't get in to access it anymore. It took a bit for the ATI 5770 to "see" and run all three screens. One blinked on and off, but I reseated the connection and it's been steady since. I'm new to this computer having moved all HD's over from a Mac Pro 1,1. Anyone know of anything I can do to fix this or further trouble shoot it. Thanks.