I had the same problem, not just with backuppc, but other documentation sites (i.e. dhelp) on localhost. It seems like the upgrade to apache 2.4 moved away from sites-enabled --> sites-available symlinks to a conf-enabled --> conf-available symlink model.
I was able to activate the backuppc web interface by moving the backuppc file from sites-available to '/etc/apache2/conf-available/backuppc.conf' then did 'a2enconf backuppc.conf' which created the symlink. After apache2ctl reload I could get into the web interface. I had to do the same procedure with my httpd.conf (moved from /etc/apache2/conf.d to /etc/apache2/conf-available) to get directory Alias /doc /usr/share/doc as well. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org