Some starfish just burnt down part of the town. We stopped the fire, but a lot of houses are destroyed.
Edit: It's Fluffy. I just saw him running around with Flint and Tinder. Can you find an anti-flint-and-tinder mod that also doesn't disable Nether Portal making? I tried to Google it, couldn't. That's why the edit is so late.
Edit2: And someone griefed the monorail, part of the track is missing at the turns, so we forget up.