Im not sure if this is by design or because they're mithril and Im a drow or what... but I died in a dungeon cell and I ran back to get my corpse as a ghost, and cant pass through the door north or south into cells, but I can pass east out of the dungeon. By design?

<17%hp 24%m 71%mv 13040tnl 3 AM>
The Dungeon

(Exits: (north) (east) (south) west)

<17%hp 24%m 71%mv 13040tnl 3 AM> n
Alas, you cannot go that way.

<17%hp 24%m 71%mv 13040tnl 4 AM> s
Alas, you cannot go that way.

<17%hp 24%m 71%mv 13040tnl 4 AM> e
A Descending Tunnel

(Exits: east (west))

Some doors are pass proof, those jail doors are some of them.