@leebennett You don't have the MDP connected to a Dual-Link DVI adapter, do you?
@matthewglidden My understanding is that it's a software problem affecting all Macs with mini DisplayPorts. My MBP has an NVIDIA card.
@HowardGMac Thanks, but that's for VGA. I'm using Dual-Link DVI. Apple has newer versions of the adapter, but apparently they're even worse.
@matthewglidden Internal display plus one external display: http://bit.ly/RexDb
The Mini DisplayPort adapter problems are becoming more frequent. Five times in the past half hour.