Comment 4 for bug 51081

Looks like you're right. Running that gives the response:

method return sender=:1.1 -> dest=:1.20
 uint32 0

However looking at what runs before and after with 'ps -ef | grep dbus' I can see that a new process begins running after running your command:

/sbin/dhclient -1 -lf /var/lib/dhcp3/dhclient.ra0.leases -pf /var/run/dhclient.ra0.pid -q -e dhc_dbus=0 -d ra0

This seems to just sit around blocking - killing it and running it causes it to sit on the command line without an IP address being allocated to ra0.

The file /var/lib/dhcp3/dhclient.ra0.leases looks like it has correct data for a lease - however its not configuring the interface with it.