Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/dbus/connection.py", line 586, in msg_reply_handler
    reply_handler(*message.get_args_list(**get_args_opts))
  File "/usr/lib/pymodules/python2.7/zeitgeist/client.py", line 659, in <lambda>
    map(Event.new_for_struct, raw)),
  File "/usr/share/gnome-activity-journal/src/store.py", line 86, in wrapper
    value = function(instance, *args, **kwargs)
  File "/usr/share/gnome-activity-journal/src/store.py", line 224, in set_ids
    self._items[event.id] = ContentStruct(event.id, event)
AttributeError: 'NoneType' object has no attribute 'id'