Fallout's The Pitt DLC is The Pitts
Pete Hines, of Bethesda, was quickly contacted by various gaming websites for comment on the game-crippling glitches caused by their expansion. He had this to say:
We are continuing to look into the issues people are experiencing with The Pitt for Xbox 360. As of now it looks like the file for the English version on Xbox Live was somehow corrupted. We are currently working with Microsoft to remove the existing file off of Live to prevent any further downloads. Our plan is to replace it with a new file as soon as possible. We hope to have another update for you shortly.
A recent update from Hines indicated that Bethesda was finishing checks on a new file, and if everything goes smoothly, the download should be available later today. Apparently it just wasn't meant to be for players to visit the Pitt...