Managed to get some more playtime in (with the 0.4.2 PDB build), and found a few more things!
* You can switch places with a friendly spirit who is inside a wall, and end up inside the wall yourself. Fortunately you can just walk back out.
* Incorporeal creatures can also drop items inside a wall upon death.
* Hostile creatures triggering a trap adjacent to the player triggers the same message as if the player had triggered the trap ("The ceiling clicks above you...").
However, I'm happy to report that I didn't get hit by the crash bug I was having before. Spent a long time in the dungeon on the starter island (is it infinite?) since that's where I saw it before, but didn't hit it this time.
The other bit of feedback I've got is, Soak seems pretty overpowered right now.
It's quite possibly because I spent most of this game so far just grinding in the first dungeon, but I'm level 14 with 39 Soak right now, and I don't think I've lost a hitpoint since level 6 or so, even to stuff that considers Dangerous. Other than some [30, 4] armour I found, my strategy has been mostly just ignore Evade and always get as much Soak as possible. Maybe once I venture past the starting island I'll think differently though (I've only done the one quest in Aeschburh in the larger world so far).