Comment 5 for bug 433132

The relevant portion of the syslog that led me to the aforementioned conclusion:

Sep 20 12:29:51 bt python: mkdir /var/lib/ubiquity/source
Sep 20 12:29:51 bt python: log-output -t ubiquity mount --bind /mnt/live/lib/modules/2.6.28.1/kernel/drivers /var/lib/ubiquity/source
Sep 20 12:29:51 bt ubiquity: Sep 20 12:29:51 ubiquity: Starting up '['log-output', '-t', 'ubiquity', '--pass-stdout', 'sh', '-c', '/usr/lib/ubiquity/localechooser/post-base-installer && /usr/lib/ubiquity/localechooser/finish-install']' for ubiquity.components.language_apply.LanguageApply
Sep 20 12:29:51 bt ubiquity:
Sep 20 12:29:51 bt ubiquity: /usr/lib/ubiquity/localechooser/post-base-installer: 49: cannot create /target/etc/default/locale: Directory nonexistent