Comment 21 for bug 1672166

As you said "I won't exclude anything at this point", I am also getting curious, I don't think it has not something to do with it but I should mention: I am using a chroot environment, so to speak I boot into a chroot environment in my external disk by means of this script https://github.com/lemonsqueeze/boot_chroot I have multiple distros that I created by means of debootstrap http://www.thegeekstuff.com/2010/01/debootstrap-minimal-debian-ubuntu-installation/

More info :
http://askubuntu.com/questions/405735/installing-multiple-linux-distros-in-a-single-partition/409229#409229