Not so, the next bill arrived with another $180 extra on it. I run straight out to the water meter to make sure that the problem really had been fixed. It had - the meter had only registered a normal amount of use since the last meter reading.
When a toilet leaks, it can really leak! All in all, I figure we spent about $550 on that leak, and only $90 of it was to get the toilet fixed.
The moral of the story - get your leaks fixed as soon as they start! And if you have a rental, make sure they know to report problems immediately!