Comment 3 for bug 380059

I'm not stepping forward to have my ass kicked, thank you very much! (I suspect the cause is code written in Debian not in Ubuntu, anyway.)

But ... could you attach /var/log/installer/syslog and /var/log/installer/partman to this bug, so that we can try to analyse what the installer thought it was doing? I can't guarantee the cause will show up there, but it'll at least be a start.