I tried everything to fix it. I never did figure it out.
Just thought about it again now while looking at the Mac App Store and I said I'd post it here.
This is especially handy if you want to make yourself a "recovery USB" using the latest OS. My ML recovery USB sticks drag me all the way back to 10.8 or even worse a developer preview. I definitely appreciate being able to download the installer, which always has the latest ML version, and make myself a fresh USB stick at a time of my own choosing.