A game breaking bug is reported in Diablo 3
With the launch of Diablo 3 just recently underway, some unfortunate players are already reporting a game breaking bug said to disconnect the user from the game's server and prevent them from logging back in.
Error 3006 is triggered when the user interacts with the Templar character early on in the game and equips the non-player character with a shield.
Multiple users on Blizzard's official Diablo III forums are pointing the bug out, and recommend that other players do not trade with the Templar. It is believed the issue may be specific to the Demon Hunter class.
Blizzard is investigating the matter, however no fixes are available as of yet.