[1.0.4] Alt Old Forest doesn't play well with vaults

[Danton]

I had the crystalline version of the old forest spawn, as well as one of those small stone vaults that's usually filled with a wight or some such. This resulted in half the vault spawning normally, and the other half of the walls (including the door) turning into crystals. The game has them listed as diggable (they aren't) and teleporting doesn't work, so the inside is completely inaccessible.