Comment 22 for bug 445164

in fact, the backports modules where used in karmic recently, there are non in lucid yet. Maybe someone can post NetworkManager output when these modules are installed.
sudo killall NetworkManager && sudo NetworkManager --no-daemon should bring that up. otherwise post cat /var/log/daemon.log |grep NetworkManager (only post the part which is necessary)
nm-applet works without these in karmic and lucid without backports.