An update addressing an issue where some loot can become unreachable after defeating The Warrior has been released on PC, Playstation 3, and Xbox 360. After installing this update, loot from the Warrior should be reachable by all players.
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-