The suggestion that this was an old build is optimistic. Let's say you're THQ, you have a good build, and you have a build full of glitches, do you send the latter to IGN so they can report it to tens of thousands of hard core gamers? If so, that's a serious lack of good judgement.
They're not a month out. They're a few days out from Gold. Submission, mastering and distribution take weeks. Halo Reach went Gold 40 days before release. We're now 26 days from Homefront's release.
Where's the public demo that was promised?
I've given reasons even before this fresh data to suggest an outcome of a Homefront disappointment is a possibility: