Was just working on creating a p2pool for nyancoin and noticed that subsidy actually halves in 500k blocks?
nSubsidy >>= (nHeight / 500000); // Nyancoin: 500k blocks
https://bitcointalksearch.org/topic/m.5278820
337k means 227M total supply (bug)
500k means 337M total supply (fix)
Dev forgot change it in first post.
Ah, thanks...almost done.