This forum post on the Chinese Diablo III website indicates that Blizzard's action/RPG is offline in Asia as they deal with duplicate items. They say (translated) "less than 0.01% of the items have been copied," though according to Blend Games, "the Asian virtual marketplace in Diablo III has become ostensibly flooded with duplicate items and hyper-inflation." Here is Google Translate's rough machine interpretation of Blizzard's Chinese statement:

First of all, we are deeply grateful to you for your patience waiting for the development team during this maintenance time in order to restore the service as a whole.

On June 10, our development team has found some error on the stored items in the database, these errors represent a very small part of the items can not be normal trading or selling. This error caused all less than 0.01% of the items have been copied, the majority of players and is not affected by this problem, but the database before removing these duplicated items, is unable to maintain stable. Therefore, we carried out the maintenance of the server, and perform the necessary operations to fix this problem. The development team is currently working to make the server able to resume service as soon as possible.

All original items and their reproductions will be removed from the database, follow-up, we will tell the exact time of maintenance completed, but currently estimated Server recovery services some time in the afternoon of June 11, 8 pm (Taiwan time).

We have also noted that part of the players during a short period of the game after the break and suffered back problems. This issue follow-up will be further instructions.Note: to restore service postponed to 20:00