Comment 4 for bug 152333

dbus-glib is a source package only.

Here's the diff of the dependencies between Debian (-) and Ubuntu (+):
-Depends: ${python:Depends}, python-glade2 (>= 2.6.0), python-gtk2 (>= 2.6.0), python-pysqlite2
-Recommends: dnsutils, dbus, python-dbus, notification-daemon, python-gnupginterface
-Suggests: python-gnome2, nautilus-sendto, avahi-daemon, python-avahi, network-manager, libgtkspell0, aspell-en, python-gnome2-desktop (>= 2.16.0)
+Depends: python (>= 2.4), python-glade2 (>= 2.6.0), python-gtk2 (>= 2.6.0), python-gnomecanvas, aspell, dnsutils, python-launchpad-integration, python-pysqlite2
+Recommends: libnotify1, notification-daemon, dbus-glib, python-avahi
+Suggests: python-gnupginterface, seahorse

It looks like we should drop "dbus-glib" and use "python-dbus" instead (from an older Debian changelog entry:"Don't recommand libdbus, python-dbus does").