A little over a year ago, I installed the Screen Spanning Doctor hack on my Rev. B iMac G5. (2Ghz, 17", 128MB Radeon 1600, no iSight) I used the machine with a second monitor for the full year with no problems, everything worked perfectly. Now I'm wanting to go back to just the built-in display, and things are acting ANNOYINGLY weird. The problem: randomly, with no identifiable cause, the iMac's built in display will automatically go to black and come back up in 800x600 resolution, only utilizing a small rectangularish portion in the middle of the display. All the windows will be cramped. This happens without any adapters plugged into the machine at all; the VGA out port is empty. The only way I can fix it is by plugging the VGA adapter into the machine, which causes the display to refresh but not change resolution, and then unplugging it, which sends it back to the regular 1400x900. I've used the Screen Spanning Doctor in reverse mode to "undo" itself with no luck, I've also zapped the PRAM. No dice. Help!