caldav/calendarobjectresource.py:634: KeyError
href is given as '/calendars/pythoncaldav-test/20010712T182145Z-123401%40example.com.ics'
in the dict there is a '/calendars/pythoncaldav-test/20010712T182145Z-123401@example.com.ics'
Difference in encoding, '@' vs '%40'.