BOO YA!
Thanks for posting this, MCD.
I'd also wanted my free copy of Fable 3, and now I've got it. I was able to re-download it, and boot it.
Now I'm downloading the Just Cause 2 copy which I purchased in the big Spring Sale! Hopefully it will complete, and work, as well!
My suspicions is that this is a temporary oversight on MS' part. While I'd like to believe that "we're removing region constrictions!" is at the heart of this, there are too many publishers who have opted for region restrictions on their own titles... It seems impossible that MS could just tell them that they're not able to have it any longer.