The Wonderland Board

I was playing one of my custom adventures when I noticed that all house doors look like this:



I've checked all the files, and the doors look just fine there. They're bugifhduigdfgf'd only in the game.

Does anyone know what might be causing this?

I don't know. One computer i use does that with waterfalls.

Pretty nice glich.
I don't know why the doors is textured like that.