Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 771, in on_add_clicked
    self.datadir, self.distro)
  File "/usr/lib/python2.7/dist-packages/softwareproperties/gtk/DialogAdd.py", line 62, in __init__
    "repository, for example  '%s'.") % ("<i>%s</i>" % example)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 in position 0: ordinal not in range(128)