Hey Jon-

A nice little tool you could throw into DF would be the ability to move all windows back to one monitor. This would be useful in situations where you commonly switch between one and two monitors. Sometimes windows will lose a window to the otherside, that is the other monitor which is no longer there. Something akin to the move window to next monitor would be perfect, as of now it is the easiest way to fix the issue. The only difference with my suggestion is that it moves all windows from the side of the desktop that is no longer there, and keeps the ones that are already on the active monitor there.

Stupid windows doesn't realize that you lose a monitor when you are on the move. Its really annoying.