I am not sure if this has been reported yet, but the the calendar that refines the tracking dates doesn’t work.
Tested on the latest version of Google Chrome, if that is important (Version 38.0.2125.101 m (64-bit))
Screenshot: http://grabilla.com/04a10-6e39c14b-f461-4e9c-8e94-6d81664c4d91.png
