open the game and go to options, graphic options, and disable hardware acceleration. i was having the same issue and this fixed it for me.
ok, i have a different problem with vista, cant seem to find many others
with this complaint. I've installed the patch, compatible XPsp2, all
that stuff... but when i go to open a campain or skirmish or pet
dungeon, the game screen is blank. i can pick up imps, if i float my
hand over an area it'll tell me if its the dungeon heart or walls or
whatever, i can select where to dig, but i cant see a thing!
Anyone know what to do?