Testing update broke gnome/metacity and network-manager

[Matteo Riva <muradin@gmail.com>]

I just did an automatic update for new packages and I came out of it
with 2 problems:

* network manager stopped working, it gave an error at the end of the
  install process then no more icon in the panel and automatic wireless
  detection/connection
* gnome panel now does not make the desktop and windows aware of it (or
  most likely metacity does not properly interact with it): the
  panels overlap with icons and maximized windows take full screen
  ending up under the panels

Any help please?