This happens to me too. NetworkManager just isn't fast enough in bringing up my WPA network interface it seems.
Ekiga should probably (optionally?) listen to the online/offline dbus stuff NM provides (like most Gnome programs do) -- "Error while starting the listener for the SIP protocol" https://launchpad.net/bugs/37406 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
