--- xfce4-session-4.8.3.orig/xfce4-session/xfsm-manager.c	2012-02-12 15:44:26.000000000 +0000
+++ xfce4-session-4.8.3/xfce4-session/xfsm-manager.c	2012-07-23 19:34:37.206335791 +0100
@@ -981,7 +981,9 @@
           XfsmClient *cl = lp->data;
           if (xfsm_client_get_state (cl) == XFSM_CLIENT_INTERACTING)
             {
-              xfsm_client_set_state (cl, XFSM_CLIENT_WAITFORINTERACT);
+              // a client is already interacting, so new client has to wait
+              xfsm_client_set_state (client, XFSM_CLIENT_WAITFORINTERACT);
+              xfsm_manager_cancel_client_save_timeout(manager, client);
               return;
             }
         }
@@ -1267,7 +1269,12 @@
                                  XfsmClient  *client,
                                  gboolean     success)
 {
-  if (xfsm_client_get_state (client) != XFSM_CLIENT_SAVING && xfsm_client_get_state (client) != XFSM_CLIENT_SAVINGLOCAL)
+  /* In xfsm_manager_interact_done we send SmsShutdownCancelled to clients in
+     XFSM_CLIENT_WAITFORINTERACT state. They respond with SmcSaveYourselfDone
+     (xsmp_shutdown_cancelled in libxfce4ui library) so we allow it here. */
+  if (xfsm_client_get_state (client) != XFSM_CLIENT_SAVING &&
+      xfsm_client_get_state (client) != XFSM_CLIENT_SAVINGLOCAL &&
+      xfsm_client_get_state (client) != XFSM_CLIENT_WAITFORINTERACT)
     {
       xfsm_verbose ("Client Id = %s send SAVE YOURSELF DONE, while not being "
                     "in save mode. Prepare to be nuked!\n",