I'm not sure if this qualifies as a bug or not. I ran into an issue where a bookcase was blocking me from entering an area, and there was an elite inside that I needed to kill in order to spawn a boss. I had no movement ability to get over the bookcase, but I did have some combat blinking scrolls which solved the problem. It's extremely situational, so I don't know how big a deal it is, but if I didn't have the scrolls this dungeon would not have been able to be completed.
Thought it was worth mentioning either way.