I installed libgksu2-0 version 2.0.13~pre1-6ubuntu2.1 from raring-proposed and confirm that the authentication mode was set to sudo. I verified this using gksu-properties and gconftool-2 -g /apps/gksu/sudo-mode.
I installed libgksu2-0 version 2.0.13~ pre1-6ubuntu2. 1 from raring-proposed and confirm that the authentication mode was set to sudo. I verified this using gksu-properties and gconftool-2 -g /apps/gksu/ sudo-mode.