So on 0.6.1, I can make it down to the fourth floor on the power plant before the game won't let me descend any further. The game locks up and constantly spews this same error to me: "NullReferenceException: Object reference not set to an instance of an object"
It's game-breaking because I can't progress down the quest line any further and it ruins my save file because I can't do anything at all. Hopefully this can be fixed.