Our plumber came out and discovered that the rubber ring around the base of the toilet in the upstairs bathroom was totally worn away, which made sense because the rubber ring and the toilet were at least 15 years old. The water from the toilet was leaking through the worn out rubber and down to the ceiling. When the plumber removed the toilet, he also noticed that the pipes were rusted out too. He explained that the pipes were used in the old days, but they are not up to code anymore because of the way they rust and cause leaks. We ended up having that repaired as well.
Although we ended up spending more money than anticipated because we had to replace the rubber ring, the toilet (which turned out to be cracked at the base as well) and pipes, we were happy with plumbing repair.
We were very satisfied with work completed by our plumber. We thought he was honest and his handiwork was really great too. The best part was that there were no more water leaks!
*I am participating in a blogger campaign by Bucks2Blog about sump pump installation and was compensated. However, the views and opinions are my own.