Bethesda Softworks rolled out today a patch for Fallout 3 to prepare it for the game's second DLC, The Pitt. Regarding the patch, Bethesda said:
It's a small update in preparation for the game's second DLC, The Pitt, which is slated for release this month.
New Features
* New achievements for The Pitt
* Support for multiple downloadable content
Fallout 3 The Pitt New Details Revealed
Rumor Starbreeze Working on New Syndicate Game
Miley Cyrus Aims For ‘Smarter’ Image