Traceback (most recent call last):
  File "/var/lib/python-support/python2.6/deluge/ui/gtkui/torrentview.py", line 263, in send_status_request
    self._on_get_torrents_status, self.filter, status_keys)
  File "/var/lib/python-support/python2.6/deluge/ui/client.py", line 361, in async_proxy
    return self.core.call(method_name, *args, **kwargs)
  File "/var/lib/python-support/python2.6/deluge/ui/client.py", line 112, in call
    raise deluge.error.NoCoreError("The core proxy is invalid.")
NoCoreError: 'The core proxy is invalid.'