Thanks to all for all this information. Two questions:
1) There seem to be many different models of the "Champion" toilets. Does the above leakage apply to ALL of them? My wife very much likes the look of the "Townsend Champion."
2) I followed the thread above where the leak problems seems to have been fixed in the Champion 4 models. Does everyone agree that it is now a safe toilet to buy, or should it still be avoided?