Ubuntu Update for gnome-screensaver USN-1716-1

Solution
Please Install the Updated Packages.
Insight
It was discovered that gnome-screensaver did not start automatically after logging in. This may result in the screen not being automatically locked after the inactivity timeout is reached, permitting an attacker with physical access to gain access to an unlocked session.
Affected
gnome-screensaver on Ubuntu 12.10