Just trying to make an install CD using the GUI selecting only fedora as an enabled repository.
I eventually get to the create step which fails with:
{{{
Got an error from /usr/lib/revisor/scripts/F12-buildinstall (return code 1)
}}}
which in turn causes some more errors after you click ok.

In "/usr/lib/revisor/scripts/F12-buildinstall" the script is failing on
{{{
yumdownloader -c $yumconf anaconda || exit 1
}}}
because the yum.conf it creates includes:
{{{
[anaconda-updates]
name=Fedora Unity Anaconda Updates for Fedora 12
baseurl=http://www.kanarip.com/anaconda/f12/x86_64/
enabled=1
}}}
but that repository is down.
{{{
http://www.kanarip.com/anaconda/f12/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 7 - ""
Trying other mirror.
Cannot retrieve repository metadata (repomd.xml) for repository: anaconda-updates. Please verify its path and try again
}}}

The GUI doesn't have an option to stop it from trying to use that repo on that step.

Version : 2.1.11
Release : 1.fc12