--- a/src/browser/libervia_main.py	Fri Oct 17 10:42:10 2014 +0200
+++ b/src/browser/libervia_main.py	Fri Oct 17 10:44:06 2014 +0200
@@ -774,13 +774,19 @@
 
     def _roomJoinedCb(self, room_jid, room_nicks, user_nick):
         _target = jid.JID(room_jid)
+
+        # XXX: _target.node.startwith(...) raises an error "startswith is not a function"
+        # This happens when node a is property defined in the JID class
+        # FIXME: pyjamas doesn't handle the properties well
+        node = _target.node
+
         if _target not in self.room_list:
             self.room_list.append(_target)
         chat_panel = panels.ChatPanel(self, _target, type_='group')
         chat_panel.setUserNick(user_nick)
-        if _target.node.startswith('sat_tarot_'):  # XXX: it's not really beautiful, but it works :)
+        if node.startswith('sat_tarot_'):  # XXX: it's not really beautiful, but it works :)
             self.addTab("Tarot", chat_panel)
-        elif _target.node.startswith('sat_radiocol_'):
+        elif node.startswith('sat_radiocol_'):
             self.addTab("Radio collective", chat_panel)
         else:
             self.addTab(_target.node, chat_panel)