Urbackup looks for clients only on eth0

It seems that urbackup sends discovery packets only on first (eth0) interface, not on all interfaces as it is stated in manual. Can it be changed in config files or is this a bug (or maybe a feature) ?
I’ve tested Urbackup v1.2.2 on linux wheezy.

This is a bug and should be fixed in 1.3: http://sourceforge.net/projects/urbackup/files/WorkInProgress/