I did not realize before but I've had an update the 2012-05-30 and the package gnome-settings-daemon was updated (from 3.4.0 to release 3.4.2-0ubuntu0.1) and the file /usr/lib/gnome-settings-daemon-3.0/keyboard.gnome-settings-plugin restored.
Since I have no more issue.
Confirmed for you ?
dpkg-query -s gnome-settings-daemon | grep Ver
Version: 3.4.2-0ubuntu0.1
I did not realize before but I've had an update the 2012-05-30 and the package gnome-settings- daemon was updated (from 3.4.0 to release 3.4.2-0ubuntu0.1) and the file /usr/lib/ gnome-settings- daemon- 3.0/keyboard. gnome-settings- plugin restored.
Since I have no more issue.
Confirmed for you ?
dpkg-query -s gnome-settings- daemon | grep Ver
Version: 3.4.2-0ubuntu0.1