Hamster crashes

I do have hamster up and running, version 2.29.4.
Trace:
File "/home/luca/Projects/gtg/trunk/GTG/plugins/hamster/hamster.py", line 238, in browser_cb
    self.sendTask(plugin_api.get_selected_task())
  File "/home/luca/Projects/gtg/trunk/GTG/plugins/hamster/hamster.py", line 85, in sendTask
    hamster_tags = set([unicode(x) for x in self.hamster.GetTags()])
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.UnknownMethod: Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/dbus/service.py", line 649, in _message_cb
    (candidate_method, parent_method) = _method_lookup(self, method_name, interface_name)
  File "/usr/lib/pymodules/python2.6/dbus/service.py", line 246, in _method_lookup
    raise UnknownMethodException('%s is not a valid method' % method_name)
UnknownMethodException: org.freedesktop.DBus.Error.UnknownMethod: Unknown method: GetTags is not a valid method