[ubuntu] dbus Rejected message from Network Manager topic

So I was inspecting the /var/log/auth.log, for reasons of the bug as listed here: https://bugs.launchpad.net/ubuntu/+s...y/+bug/1311316 and I found this, which possibly is not related to the bug, but I did not manage to find what it means, why it happens and should I worry:

dbus[479]: [system] Rejected send message, 7 matched rules; type="method_return", sender=":1.74" (uid=0 pid=2050 comm="/usr/sbin/dnsmasq --no-resolv --keep-in-foreground") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.5" (uid=0 pid=817 comm="NetworkManager ")