An update addressing a possible issue with the mission “Medical Mystery” where players are unable to complete the objective “Search Dr. Mercy” has been released for PC, Playstation 3, and Xbox 360. Once this update has been applied, all objectives will be able to be completed.
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-