I'm trying to get my namecoin balance above the payout threshold, however, while the bitcoin balance keeps rising, my namecoin balance is unaffected (the "24 Hour Earnings" field is rising, though). In case that matters, I've switched to mergedmining.btcguild.com for the time being.
Do you think you could look into this?
I've found the problem with mergedmining.btcguild.com. It still has the X-Stratum header which means any client with Stratum support ends up redirecting itself to the Stratum servers (which already removed NMC merged mining). I'll be updating it in a few hours to remove the redirect from the mergedmining.btcguild.com server.