[catabur]

As you can see, there's a slight chance to be stuck in a floor that is covered in walls.
Part of it is cut off, but it was said that going diagonal does not work.

[Neus]

Any details about the dungeon? Level, titles, theme?

[catabur]

Flamewing09 has informed me that it was a level ~57 Castle.

[Neus]

Okay, well, currently the game will pick a specific location if it can't find a free turf to spawn the dungeon exit. Now it will pick the first empty turf it finds if that happens. So, in the next update, if you enter any dungeons where there's something occupying the same tile as the stairs, post a screenshot with details. But you shouldn't get stuck in the walls again (hopefully).