An update addressing of a possible issue where the game may become unresponsive if a player is wearing the Mechromancer's "Bullet Buccaneer" head in a multiplayer game has been released on PC, Playstation 3, and Xbox 360. After this update has been applied, the game will no longer become unresponsive in this scenario.
For update information, please visit:
Xbox 360: http://support.gearboxsoftware.com/entries/22147216-Xbox-360-Update-Hot-Fix-Information
Playstation 3: http://support.gearboxsoftware.com/entries/22127181-PlayStation-3-Update-Hot-Fix-Information-