Comment 2 for bug 1381050

Here's a traceback of the exception:

org.freedesktop.DBus.Python.UnicodeEncodeError: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/python3/dist-packages/softwareproperties/dbus/SoftwarePropertiesDBus.py", line 288, in AddKey
    return self.add_key(path)
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 800, in add_key
    if not os.path.exists(path):
  File "/usr/lib/python3.4/genericpath.py", line 19, in exists
    os.stat(path)
UnicodeEncodeError: 'ascii' codec can't encode character '\xea' in position 20: ordinal not in range(128)