Comment 5 for bug 160796

I'm not familiar with nUbuntu, which you seem to be installing, and so it's difficult for me to support this.

However, the problem here seems to be that console-setup isn't in the read-only file system on the live CD, and so ubiquity has to install it in a context where it isn't quite prepared to do so. In Hardy, this should be fixed because ubiquity will instead queue it for installation and install it when it actually is ready:

ubiquity (1.7.7) hardy; urgency=low

[...]
  [ Colin Watson ]
  * Prevent apt-install from installing packages directly unless
    install_extras has been run (previously, it would do so once apt was
    configured, which produced some confusing error messages).
[...]

 -- Evan Dandrea <email address hidden> Wed, 13 Feb 2008 15:03:15 -0500