Robert, the user cache is /var/lib/AccountsService/users/. It would seem that there may be an issue here for accounts that are created before the patches may be marked as system accounts until the cache is refreshed.
Robert, the user cache is /var/lib/ AccountsService /users/ . It would seem that there may be an issue here for accounts that are created before the patches may be marked as system accounts until the cache is refreshed.