Cannot colaborate via School Server

[carrott]

One of our XOs connects to the schoolserver wlan, registers with the school server and can access moodle, but does not show up in the neighbourhood of nor is it able to see the other XOs which seem to be successfully on the school server.

The attached logs are covered in errors (I have (perhaps foolishly) reported several of the not obviously related errors separately). The two logs are from consecutive restarts.

Seemingly the worst (but not the first) error:

1310170889.611130 ERROR dbus.connection: Exception in handler for D-Bus signal:
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/dbus/connection.py", line 214, in maybe_handle_message
    self._handler(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/jarabe/model/buddy.py", line 130, in __name_owner_changed_cb
    Connection(name, path, ready_handler=self.__connection_ready_cb)
  File "/usr/lib/python2.7/site-packages/telepathy/client/conn.py", line 49, in __init__
    object = self.bus.get_object(service_name, object_path)
  File "/usr/lib/python2.7/site-packages/dbus/bus.py", line 244, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python2.7/site-packages/dbus/proxies.py", line 241, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python2.7/site-packages/dbus/bus.py", line 183, in activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python2.7/site-packages/dbus/bus.py", line 281, in start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python2.7/site-packages/dbus/connection.py", line 630, in call_blocking
    message, timeout)
DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Telepathy.Connection.gabble.jabber.f35f4e1368d445c4024e748e27ccd926a19358f7_40schoolserver_2ecarrott_2eorg_2fsugar was not provided by any .service files