Traceback (most recent call last):
  File "/usr/share/system-config-printer/jobviewer.py", line 1060, in on_selection_changed
    printer = self.printer_uri_index.lookup (uri)
  File "/usr/share/system-config-printer/jobviewer.py", line 109, in lookup
    return self._map_printer (uri=uri, connection=connection)
  File "/usr/share/system-config-printer/jobviewer.py", line 135, in _map_printer
    raise KeyError
KeyError