Oh, I didn't mean stuck as in a bug. I got to a cave hole in the mountain and couldn't get in, but felt like I had explored everything else. I didn't know what else to do. I did end up getting physically stuck (your option #2 in your response) going down one screen from there, but that's just because there was only one walkable tile of space before a solid, my game has a couple lingering instances of that too.