I purchased a Champion a month ago and had the same leaking gasket problem I have seen reported here. I examined the orange gasket of the flush valve and found that it was not seated correctly in the plastic slot. I seated it with my fingers and the leaking went away and has not reappeared. My problem at this point is that the chain pops of every few flushes. That is the answer I am seeking that lead me to find this web site. Other than the chain popping off, I am quite happy with the toilet so far.