There is something going on with recent update - my server failed to bring up dhcp interfaces too. It shows up that it's because "lo". /etc/init.d/interfaces reports that lo is already up (but it's not configured) - dhcp fails to start (since no 127.0.0.1). So shutdown/startup interface cleanup is somehow wrong (adding to /etc/init.d/network - ifdown lo; ifup lo - fixed entire process for me).
Cheers - Adrian -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org