I can replicate the issue on my end and the error is located in mobile_app.py. - - [24/Jan/2015 00:19:38] "HTTP/1.1 GET /jl" - 500 Internal Server Error
Traceback (most recent call last):
  File "OSPi/web/application.py", line 239, in process
    return self.handle()
  File "OSPi/web/application.py", line 230, in handle
    return self._delegate(fn, self.fvars, args)
  File "OSPi/web/application.py", line 420, in _delegate
    return handle_class(cls)
  File "OSPi/web/application.py", line 396, in handle_class
    return tocall(*args)
  File "OSPi/plugins/mobile_app.py", line 160, in GET
    date = time.mktime(datetime.datetime.strptime(event["date"], "%Y-%m-%d").timetuple())
TypeError: string indices must be integers

I am not sure if the format changed however I will see what I can find out.

Thanks for the report!