Forums | MacLife

http://www.dailytech.com/Bethesdas+Late … e14665.htm

Bethesda wrote:

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.

"Issues" include missing assets, lack of boundaries on structures and edges of the map, flashing textures, etc.
The PC version is suffering from crashes and lockups, as well.
From what I've been reading on Bethesda's forums, it sounds like a lot of it is due to incomplete downloads, which makes sense if the original file sent to XBL was somehow damaged.

I believe they've pulled it from XBL, but the PC version is still available "at your own risk."
And if you DID get it before it was pulled:

gstaff wrote:

When the new version is available, you’ll want to delete the Pitt DLC you currently have and redownload it. The way LIVE works, there’s no cost to redownload.

Updates on any progress will undoubtedly be posted on Bethesda's blog.

I had been planning on downloading it sometime today (while I was using my console, to avoid having to leave it on overnight with water seeping into the basement, but that's another story).
I forgot about it completely until I saw that article on DailyTech, and now I'm kind of glad that I did forget, because my experience won't have been ruined by this corrupted file.