Gabble: Private invite breaks on receiver side

[greenfeld]

1. Connect/register a few XOs to a schoolserver.
2. Have one XO start the Write activity (or Chat), but do NOT make it publicly shared.
3. From the Network view on the first XO, attempt to invite a second to join the private activity.

Expected: The second user should receive an invitation to join the activity.
Actual: The second XO silently logs an exception to shell.log:

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/dbus/connection.py", line 586, in msg_reply_handler
    reply_handler(*message.get_args_list(**get_args_opts))
  File "/usr/lib/python2.7/site-packages/jarabe/model/invites.py", line 200, in __get_properties_cb
    handler = '%s.%s' % (CLIENT, properties['type'])
KeyError: 'type'

Seen in OLPC 11.3.0 os3 & XO-1.75 os42.

[greenfeld]

shell.log on XO receiving invite

[erikos]

Just tested with Salut here on build os3 as working.