backports dist-upgrade issue (udev breaks consolekit)

[Olivier Langella <olivier.langella@moulon.inra.fr>]

Dear maintainers,

I am using Debian stable with wheezy-backports and I had a dist-upgrade 
issue today.
all of these package were removed :
The following packages will be REMOVED:
  aptdaemon colord consolekit gdm3 gnome gnome-bluetooth 
gnome-color-manager gnome-core gnome-power-manager
  gnome-session gnome-session-fallback gnome-shell 
gnome-shell-extensions gnome-system-log gnome-user-share
  libcanberra-pulse network-manager-gnome policykit-1 policykit-1-gnome 
pulseaudio pulseaudio-esound-compat
  pulseaudio-module-x11 python-aptdaemon python-aptdaemon-gtk 
python-aptdaemon.gtk3widgets python-aptdaemon.gtkwidgets
  software-properties-gtk

I've tried to dig a little bit, and it seems that the "udev" package 
from the current backports breaks "consolekit" (which is needed by the 
removed packages) :

# apt-get install udev
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libudev1
The following packages will be REMOVED:
  aptdaemon colord consolekit gdm3 gnome gnome-bluetooth 
gnome-color-manager gnome-core gnome-power-manager
  gnome-session gnome-session-fallback gnome-shell 
gnome-shell-extensions gnome-system-log gnome-user-share
  libcanberra-pulse network-manager-gnome policykit-1 policykit-1-gnome 
pulseaudio pulseaudio-esound-compat
  pulseaudio-module-x11 python-aptdaemon python-aptdaemon-gtk 
python-aptdaemon.gtk3widgets python-aptdaemon.gtkwidgets
  software-properties-gtk
The following NEW packages will be installed:
  libudev1
The following packages will be upgraded:
  udev
1 upgraded, 1 newly installed, 27 to remove and 234 not upgraded.
Need to get 1136 kB of archives.
After this operation, 35.2 MB disk space will be freed.
Do you want to continue [Y/n]?


an "aptitude dist-upgrade" gives an interesting message :
The following packages have unmet dependencies:
 udev : Breaks: consolekit (< 0.4.6-1) but 0.4.5-3.1 is installed.
 libvirt-bin : Breaks: avahi-daemon (< 0.6.31-3~) but 0.6.31-2 is 
installed.
               Breaks: avahi-daemon:i386 (< 0.6.31-3~) but it is not 
going to be installed.
 libvlccore5 : Depends: vlc-data (= 2.0.3-5) but 2.1.2-2~bpo70+2 is to 
be installed.

I have not seen such related bug in the debian bug report tool, and it 
doesn't seems to be described in the mailing list.

Several people in my lab had also this problem and some were in serious 
trouble because they've lost their desktop.
Does someone has noticed this issue somewhere else ?
What can I do to help this to be resolved ?

Thank you very much,
Best regards

PS:
sorry for my poor english

Olivier