The log says:
2012-08-31 18:39:25,629 - softwarecenter.backend - ERROR - error in _on_trans_finished 'Error: Requires installation of untrusted packages This requires installing packages from unauthenticated sources.
gnome-codec-install totem-plugin-arte'
The log says:
2012-08-31 18:39:25,629 - softwarecenter. backend - ERROR - error in _on_trans_finished 'Error: Requires installation of untrusted packages
This requires installing packages from unauthenticated sources.
gnome-codec-install totem-plugin-arte'