aoeu ~ (3.1M) $ sudo add-apt-repository ppa:tualatrix/ubuntu-tweak
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.6/dist-packages/softwareproperties/ppa.py", line 60, in run
    self.add_ppa_signing_key(self.ppa_path)
  File "/usr/lib/python2.6/dist-packages/softwareproperties/ppa.py", line 79, in add_ppa_signing_key
    '\"signing_key_fingerprint\": \"(\w*)\"', lp_page)[0]
IndexError: list index out of range