A small leak has sprung in the living room ceiling under the bathroom a few minutes after the toilet was flushed this afternoon. So I decided that I would run water in the tub and sink and see what happens. And what do you know, the same thing happened only the leak was farther into the living room.

I'm assuming this leak is traveling down the waste pipe. I have no water level issues in the toilet, no gurgling, no water sitting at the base of the toilet. I was so hoping this was a simple case of replacing the wax ring, but I think I'm going to have to cut out part of my ceiling and investigate. Grumble, grumble.

Any thoughts/comments/sympathy would be appreciated.