With this much information it should be a matter of 1-2 hours to track down the 20%. Is zpool running yiimp or yaamp?
I agree, I've given it my best shot and narrowed the problem as you quoted above. It looks like the user data for each block
is stored in SQL and the payout data is taken from SQL. They should match. The next step seems obvious although I've stated
it many times already.
Yiimp vs yaamp might be part of the problem. The original yaamp supported auto-exchange of mined coins but when TPruvot forked it
he dropped auto-exchange for his yiimp pool. Somewhere along the way Zpool came out and supported auto-exchange using
the yiimp fork.
Although the problem appears not to be related to exchange (ie the loss also occurs when mining same coin as payout)
it is possible the exchange code is still being run and performning a null-exchange of some kind when calculating the
balance. But that's just speculation.
I was going to write a brainstorming post trying to dig further into the mystery, but what's the point? The operator is apparently not interested.
@joblo, please drop me a PM for a hint where I can point my miners. I cannot PM you since I cannot see the captcha images.