Comment 11 for bug 73849

Indeed, Jeff's diagnosis is correct. To quote from my analysis of bug 160796:

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