An updated upstart package that fixes a bug in utmp table updating is now available.
Upstart is an event-based replacement for the /sbin/init daemon, which handles starting of tasks and services during boot, stopping them during shut down, and supervising them while the system is running.
When a mingetty session is terminated, the relevant entry in the utmp table is now correctly set to "DEAD_PROCESS".
All users are advised to upgrade to this updated package, which resolves this issue. Note that after installing this update, a system reboot is required for the above changes to take effect.