Comment 42 for bug 306362

avahi-daemon also breaks. It has several dbus interface from which it sends signals which are denied with this fix. Most of those interface also have methods but those should work correctly as it has <allow send_destination="org.freedesktop.Avahi"/>. The easiest way to test for this is by running avahi-discover.

I'll try to investigate the minimal fix tomorrow (if time allows, feel free to beat me to it).