I've been playing it a bit so far, and I"ve noticed a few oddities.
For one: On the Quest for the Hero campaign, when starting, for some reason all creatures are replaced by immobile hell hounds stuck in running animation. It tells me I have imps, but they look like hell hounds and do nothing.
Second: Gem veins seem bugged. I've played a bit in the Good Campaign, and when digging gold away from around gem veins, they... well, bug out. The block turned into nine mini-tiles of random type, and became unminable :S
Should I try running it in debug mode and send in a report? I'm pretty certain it's not supposed to happen :P