apps>gksu>sudo-mode key

Binary package hint: gconf-editor

I am reporting this bug on behalf of several users from the french speaking ubuntu forum who just made clean dapper installs or dist-upgrades.

Running apps needing root authentication from the gnome menu ie with gksu (synaptic for example) brings an error message related to gksu-run-helper and su : Authentication failure.

users are in adm and admin groups, nothing particular with sources.list, locale, .Xauthority or .ICEauthority files.

gconf-editor shows lots of missing entries.
gconf-editor --get /apps/gksu/sudo-mode does not pop up the sudo-mode key panel.

Problem solved with :
http://ubuntuforums.org/showpost.php?p=1164346&postcount=11
cd /usr/share/gconf/schemas
sudo gconf-schemas --register *.schemas

I cannot personnaly reproduce this bug (dapper clean install in july), but it looks like many people cannot succed in getting graphical root privilege due to ... what, some «smurk» in the install and even resintall process.