Mass Effect Pinnacle Station DLC Issues

While Pinnacle Station ran flawlessly on with my original Xbox 360 version of Mass Effect, it appears that owners of the Platinum Edition and/or the Steam version are having troubles with the DLC. QA lead Jack Lamden has been busy trying to patch things up on the official forums (here, here, and here):
This post is going to be short and sweet since I don't have much information at this point.

We're looking into this issue at the moment and are working to resolve it as quickly as we can.

I don't have an ETA for a fix as of yet.


We're working on the issue right now. There is no ETA for a fix just yet, we're trying to get this sorted ASAP.

There's not a whole lot more information I have available at the moment.


We talked to microsoft quite a bit today, they were able to reproduce the issue and it looks like something that's nearly impossible to catch until it happens.

They're working on a fix at the moment, but I still do not have an ETA.


I haven't really looked into whose fault the issue is, just what the fault in the software is and how it can get fixed quickly.
And this comment is directed at those of you with the Steam version:
We have an installer that gets past that message, it's getting put through the proper channels at the moment to get it to replace what's currently on the store.

I'm really hoping the process will be done soon, but I still don't have an ETA.