at-spi2 testing

Before I dig further, this may be obvious to one of you...

dbus-launch, at-spi-bus-launcher and at-spi2-registryd are running.

at-spi-bus-launcher provides org.a11y.Bus

org.a11y.Bus.service (and org.a1y.atspi.Registry.service) are in
share/dbus-1/services

orca 3.3.90 however is dying at line 44 of settings_manager.py:

  _proxy = _bus.get_object("org.a11y.Bus", "/org/a11y/bus")

Trying this from within a python prompt gets me:

dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited:
  Launch helper exited with unknown return code 0

Does this ring a bell with anyone?

Cheers,

Patrick

(BTW I got to the bottom of that "orca configure finds python modules which
aren't installed" problem, and wrote up the explanation for a 1 word fix in
Bug 670685)