miro error

Exception
---------
Traceback (most recent call last):
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/trapcall.py", line 43, in trap_call
    function(*args, **kwargs)
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/eventloop.py", line 595, in _idle_iterate_step
    retval = iterator.next()
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/devices.py", line 1518, in scan_device_for_files
    known_files = clean_database(device)
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/devices.py", line 1479, in clean_database
    device.db_info)
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/item.py", line 2634, in get_by_path
    return view.get_singleton()
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/database.py", line 192, in get_singleton
    results = list(self)
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/database.py", line 167, in _query
    id_list = self._query_ids()
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/database.py", line 175, in _query_ids
    self.joins, self.limit))
  File "/home/knut/miro/tv/linux/dist/usr/lib/python2.7/site-packages/miro/storedatabase.py", line 1061, in query_ids
    self.cursor.execute(sql.getvalue(), values)
ProgrammingError: You must not use 8-bit bytestrings unless you use a text_factory that can interpret 8-bit bytestrings (like text_factory = str). It is highly recommended that you instead just switch your application to Unicode strings.