Thanks! That seems to have fixed it, but for right now the three hard-coded IP seed nodes for Namecoin are all refusing connections, so my client isn't finding any peers to connect to. Was there a new version adopted that change the ports or magic bits of network communications?
Check commits from days 24/05 (mainnet) & 25/05 (testnet) to find the right magic numbers :
https://github.com/khalahan/namecoin/commits/namecoin_v0.8.2rc2 (but they have not changed).
If you reject merged mined blocks, this is another reason why your peer disconnects itself from remote nodes.