i found a workaround here: http://ubuntuforums.org/showthread.php?t=285176&highlight=debconf+nice+edgy
Running sudo dpkg-reconfigure debconf and choosing "dialog" as frontend solved the issue. This worked for me. -- debconf error on upgrade install [feisty] https://launchpad.net/bugs/85800 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
