I've had similar trouble with libnss-mdns. In my case it was due to the upgrade to Lenny.
Using aptitude, it pulled in recommended packages (not sure whether that was disabled before, but hey, maybe aptitude's preferences were changed as it got updated BEFORE the actual upgrade, as recommended by the Lenny Release Notes). Unfortunately, sun-java6-jre (mea culpa) recommended libnss-mdns, which in turn depends on avahi-daemon, so all of that got installed although I don't it. After removing it, make sure to restart crucial services, or better yet, reboot the machine to be safe. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org