just a quick small tip... so as not to waste too much list space.to collect a list of 'orphan' files (files that your current system doesn't depend on) on your system and then remove them:
$ apt-get install deborphan $ deborphan > <filename> $ cat <filename> | dpkg --purgethis will use <filename> as a package list of the items you want to remove (including config files).
worked like a charm for me! -jeff