There are reports out of China that tensions are flaring over Diablo III. Since the game hasn't been officially released in Mainland China yet, some Chinese players are acquiring copies of the game and then logging onto Asian servers in other regions.
This influx is apparently causing servers to lock up and give the infamous Error 37. This is, in turn, pissing off Korean players who are blaming Chinese gamers for the connection problems. That's why some Korean Diablo III players are even calling for Chinese players to be banned from the servers—something that is obviously pissing off paying players in Taiwan, who are getting lumped in with the Mainlanders.