TB when joining MUC from 2 accounts
Traceback (most recent call last):
File "/home/deluge/CVS/gajim/gajim/src/dialogs.py", line 796, in on_join_button_clicked
gajim.interface.roster.join_gc_room(self.account, jid, nickname, password)
File "/home/deluge/CVS/gajim/gajim/src/roster_window.py", line 336, in join_gc_room
if gajim.interface.msg_win_mgr.has_window(room_jid) and
KeyError: u'linux@chat.chrome.pl'