Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/softwareproperties/kde/SoftwarePropertiesKDE.py", line 689, in add_key_clicked
    if not self.add_key(filename):
  File "/usr/lib/python2.6/dist-packages/softwareproperties/SoftwareProperties.py", line 608, in add_key
    if not os.path.exists(path):
  File "/usr/lib/python2.6/genericpath.py", line 18, in exists
    st = os.stat(path)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 17: ordinal not in range(128)