Originally posted by loppantorkel:

I've had a strange thing happen to me twice now - One large block of stone disappears from my building. It's as if I had poked it out for a window. No structural damage around the vanished brick. Same place both times. I don't think there has been any stone material left below as it was broken down. The house is structurally sound and I have no idea why that brick has disappeared twice now, with tens of day in between, I suspect a bug of some kind.

Same happens to me but its been because the structure is not properly supported. Are the bricks around it red when you have your crafting hammer equipped?