Hey Thomas,

My DVI KVM also does this. I know exactly what you're talking about. As an experiment, try hooking the DH2G up to two DVI monitors and setup Cat. Then hot, unplug the monitors and plug in the processors. See if this works.

At best guess if the problem is the same as what I am experiencing, the scan rate of the DH2G is different than what the processor thinks it is. I could be wrong but what I do know is that the DH2G is not as intelligent at display recognition as the Mac itself.