Apparently, an older version was uploaded instead of the latest one. The upshot was that if you hadn't updated Installer.app to the latest version before you ran the script, it won't work after you get into 1.1.3.
Sadly, I don't have access to the rapidshare account that the old ones were uploaded to so I can't correct the mistake, but I can give you guys the new link:
http://rapidshare.com/files/86954656/jb113.zip
If you already updated, and Installer.app doesn't work for you, you can SCP the Installer.app included in the file I linked into /Applications/ (deleting the old /Applications/Installer.app directory first). Then, in SSH, issue the following command: chmod 4755 /Applications/Installer.app/Installer
Sorry for the cock-up everyone.