I recently encountered a bug in the mines. Roehm woke up less than 8 hours ago, so he should not be tired. However, 10 seconds after my save, the game suddenly declares that I can't go on without sleep forever, though I still feel like I could take on the world. 10 seconds after that, Roehm passes out from exhaustion and dies. I had a couple sequential saves, but all were in the mines, and all fall victim to this bug before I can exit the mines.
I can attach a save file if that would be helpful, as soon as I, ahh, figure out where the save games are for Mac.