Third time's the charm, right? The first batch was corrupted; the second plagued with random freezing. Now the third version of The Pitt is up for download, and Bethesda urges anyone experiencing freezing issues to go into their Xbox 360 memory, delete the previous version, and download the latest file. They've posted a handy guide on how to do this on the Bethesda Blog, in case you don't remember how you did it a week ago.
Hopefully this is the last time I will have to cut, paste, and slightly modify this same post.
Update on The Pitt [Bethesda Blog]