I got a quest to go rescue some knight dude (and the quest location was all the way on the other side of a mountain range, in a region I hadn't explored, right on the edge of enemy territory, so I really had to work for it too). After (finally) getting to the cave, I freed the knight. I wasn't sure what to do at that point, since in my previous game, taking the knight back to my city as instructed didn't do anything. So I tried to take a look at the quests pane in the nation overview screen. Instant crash.

Debug.err, DxDiag.txt