Traceback (most recent call last):
  File "/usr/bin/gnome-activity-journal", line 94, in <module>
    from src.main import PortalWindow
  File "/usr/share/gnome-activity-journal/src/main.py", line 30, in <module>
    from activity_widgets import MultiViewContainer, TimelineViewContainer, ThumbViewContainer
  File "/usr/share/gnome-activity-journal/src/activity_widgets.py", line 35, in <module>
    from store import ContentStruct, CLIENT
  File "/usr/share/gnome-activity-journal/src/store.py", line 504, in <module>
    STORE = Store()
  File "/usr/share/gnome-activity-journal/src/store.py", line 367, in __init__
    days_population = ZeitgeistDBusInterface().get_extension("Log", "journal/activity").GetHistogramData()
  File "/usr/lib/pymodules/python2.7/zeitgeist/client.py", line 108, in __getattr__
    raise TypeError("Unknown method name: %s" % name)
TypeError: Unknown method name: GetHistogramData