Upgrading from a version prior to 1.9.15: The sudoers plugin now uses a time stamp path name that is based on the user-ID instead of the user name. For example, a time stamp file that was /var/run/sudo/ts/root in sudo 1.9.14 will now be /var/run/sudo/ts/0. The lecture flag file name is now also based on the user-ID, which will result in users receiving the sudo lecture again on upgrade to sudo 1.9.15.