Bug#209279: base-config: looking ugly after a d-i install
> because installing locales inserts LANG=C into /etc/environment,
A related issue, and the one triggering this bug report in the first
place, is that the debconf version in Sarge is unable to use the C
locale with the linux terminal. This can be tested in the linux
console, using the following commands:
LANG=C TERM=linux dpkg-reconfigure debconf
This will show the dialog boxes without border lines. When using
vt100 terminal instead, the dialog boxes look just fine.
LANG=C TERM=vt100 dpkg-reconfigure debconf
This suggests that there is a problem with the dialog frontend and the
linux console terminal type.