Found the issue. It is a missing lookup key / version in the file /usr/share/pyshared/lsb_release.py, which belongs to the "lsb-release" package.
As a workaround, add: '6.0' : 'squeeze', ...to the list of distributions in this file until we have a bugfix for this. The bug http://bugs.debian.org/609325 tracks this issue. -- Stig Sandbeck Mathisen ooo, shiny! -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org