I get the following error trying to add af7f875b2929c10aa9110f4faae5d83299a07a56 as a trusted notary:

2014-10-12 21:47:36,337 - tornado.application - ERROR - Uncaught exception in /ws
Traceback (most recent call last):
  File "/home/pigeons/OpenBazaar/env/local/lib/python2.7/site-packages/tornado/websocket.py", line 369, in _run_callback
    callback(*args, **kwargs)
  File "/home/pigeons/OpenBazaar/node/ws.py", line 1144, in on_message
    if self.app_handler.handle_request(self, request):
  File "/home/pigeons/OpenBazaar/node/ws.py", line 1056, in handle_request
    self._handlers[command](socket_handler, params)
  File "/home/pigeons/OpenBazaar/node/ws.py", line 210, in client_add_trusted_notary
    self.market.add_trusted_notary(msg.get('guid'), msg.get('nickname'))
  File "/home/pigeons/OpenBazaar/node/market.py", line 245, in add_trusted_notary
    notaries = json.loads(notaries)
  File "/usr/lib/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting property name enclosed in double quotes: line 1 column 3 (char 2)