I installed gnome desktop on ubuntu trusty, and can also reproduce the issue in gnome-control-center.
The package version is: gnome-control-center 1:3.6.3-0ubuntu56.1
$ gnome-control-center --version gnome-control-center 3.6.3
I installed gnome desktop on ubuntu trusty, and can also reproduce the issue in gnome-control- center.
The package version is: center 1:3.6.3-0ubuntu56.1
gnome-control-
$ gnome-control- center --version center 3.6.3
gnome-control-