Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py", line 539, in on_button_settings_clicked
    self.fillstore()
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py", line 717, in fillstore
    "summary", None))
  File "/usr/lib/python3.2/xml/sax/saxutils.py", line 34, in escape
    data = data.replace("&", "&")
AttributeError: 'NoneType' object has no attribute 'replace'