When receiving an invitation to a muc, the inviter (== actor) is not added as a member of the muc.

(telepathy-salut:32576): salut-DEBUG: new_connection_cb: Handling new incoming connection
(telepathy-salut:32576): salut-DEBUG: new_connection_cb: Have to wait to know the contact before announce this incoming connection
(telepathy-salut:32576): salut-DEBUG: incoming_pending_connection_stream_opened_cb: incoming pending connection with dev@cass-x200s opened. Open it too
(telepathy-salut:32576): salut-DEBUG: incoming_pending_connection_got_from: Got stream from dev@cass-x200s on pending connection
(telepathy-salut:32576): salut-DEBUG: incoming_connection_found_contact: identify incoming pending connection with dev@cass-x200s. It's now fully open
(telepathy-salut:32576): salut-DEBUG: salut_xmpp_connection_manager_take_connection: connection ref count raised 1. Remove its timer
(telepathy-salut:32576): salut-DEBUG: invite_stanza_callback: Got an invitation
(telepathy-salut:32576): salut-DEBUG: salut_muc_manager_new_muc_channel: Requested channel for handle: 1
tp_group_mixin_change_flags: emitting group flags changed
  added    : [CAN_ADD|MESSAGE_ADD|PROPERTIES]
  removed  : []
  flags now: [CAN_ADD|MESSAGE_ADD|PROPERTIES]
(telepathy-salut:32576): salut-DEBUG: salut_muc_channel_invited: Got an invitation to badger from dev@cass-x200s
emit_members_changed_signals: emitting members changed
  message       : ""
  added         : []
  removed       : []
  local_pending : [1 (dev2@cass-x200s)]
  remote_pending: []
  actor         : 2
  reason        : 4: invited


But when you are invited to a gabble muc:

emit_members_changed_signals: emitting members changed
  message       : ""
  added         : [3 (cassidy-test1@jabber.belnet.be)]
  removed       : []
  local_pending : [8 (test@conference.jabber.belnet.be/cassidy-test2@jabber.belnet.be)]
  remote_pending: []
  actor         : 3
  reason        : 4: invited