Removing the libdata-alias-perl package helps. Apache and WebGUI works again. Tested on fresh Sid and Wheezy. No other package depended on libdata-alias-perl.
I would not call this solution but rather clue for someone more experienced in the matter who can really find the cause and possibly fix it. -- Marek Andričík -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org