[Mobhack]

Yes - immediately going into the edit map function (in the scenario editor) and pressing M to disable map text seems to do the trick.

After doing that I went and bought troops and then deployed them - no black screen.

In the middle of the deplyment I pressed M again to turn map text back on - still no black screen.

My thoughts are that that map has at least 1 bad map string. Turning map text off then on again seems to cull the bad data. A save from the scenario editor may fix that - will experiment later.