There was some changes on the pool - getwork servers were switched to serve only mining on PPLNS payment method.
This moment, if you are using getwork protocol, you mining bitcoins on PPLNS, no matter, what is on setup page.

Before changes, on getwork protocol there were also NMC (namecoin) merged mining.
At this moment, NMC balance is no more increasing, no matter what protocol used - getwork or stratum.

Does anybody know how to to fix this? Or this is mining pool issue?

Please, who can do it, repost this message there.

Sorry for my english.