new email notification doesn't work

0.11.4-0ubuntu1 in Hardy. New email notification doesn't work, output on console:

ERROR:dbus.connection:Unable to set arguments (dbus.String(u'Gajim'), dbus.String(u'/usr/share/gajim/data/pixmaps/events/new_email_recv.png'), dbus.UInt32(0L), 'email.arrived', dbus.Byte(0), dbus.String(u'Nowa poczta w skrzynce <email address hidden>'), dbus.String(u'Masz 1 nieprzeczytan\u0105 wiadomo\u015b\u0107 pocztow\u0105\nOd: <email address hidden>'), [dbus.String(u'/usr/share/gajim/data/pixmaps/events/new_email_recv.png')], {'default': 0}, [''], True, dbus.UInt32(5L)) according to signature u'susssasa{sv}i': <type 'exceptions.ValueError'>: invalid literal for long() with base 10: '/usr/share/gajim/data/pixmaps/events/new_email_recv.png'
Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/dbus/connection.py", line 563, in msg_reply_handler
    reply_handler(*message.get_args_list(**get_args_opts))
  File "/usr/share/gajim/src/notify.py", line 525, in version_reply_handler
    self.attempt_notify()
  File "/usr/share/gajim/src/notify.py", line 470, in attempt_notify
    error_handler=self.notify_another_way)
  File "/var/lib/python-support/python2.5/dbus/proxies.py", line 132, in __call__
    **keywords)
  File "/var/lib/python-support/python2.5/dbus/connection.py", line 543, in call_async
    message.append(signature=signature, *args)
ValueError: invalid literal for long() with base 10: '/usr/share/gajim/data/pixmaps/events/new_email_recv.png'

Locale is pl_PL.