api.GetMentions errors #250

I'm running python-twitter 0.8.5 on the raspberry pi. I didn't have this error 
before but it seems to have just happened now without any changes to the script.

This is the error which I get.

File "twitter_interface.py", line 19, in <module>
    morsetweets = api.GetMentions()
  File "/usr/local/lib/python2.7/dist-packages/python_twitter-0.8.5-py2.7.egg/twitter.py", line 3475, in GetMentions
    data = self._ParseAndCheckTwitter(json)
  File "/usr/local/lib/python2.7/dist-packages/python_twitter-0.8.5-py2.7.egg/twitter.py", line 3875, in _ParseAndCheckTwitter
    raise TwitterError("json decoding")
twitter.TwitterError: json decoding

Thanks in advance!