stopped /usr/local/bin/dbus-daemon (pid 3897)
rm: can't remove '/var/run/dbus/pid' : no such file or directory
This message is normal - it arises because when you first start the cups daemon, it tries to restart the dbus daemon. If the dbus daemon is not running, then there is no dbus pid file and hence the error message. If you check, you'll find both the dbus and cups daemons are running.
Note that you'll only see this message the first time you start cups, it will not attempt to restart dbus on subsequent attempts.