I made a cauldron on my claim yesterday, to make beermaking easier. A few minutes ago, I used it to make a batch of tea. Now, when I rightclick it, nothing happens -- I run up to it and hump it, but I don't see the bar that shows water and fuel levels -- it's basically like I r-clicked a a quern or anvil or something.
How do I fix this?

EDIT: Now it's not working on my town's cauldron either -- I did it once, and it looks like somehow I bugged the cauldron, because the next time I tried, it didn't work.

halp