Griffith is a great program, but if freezes a lot on my system

Here are some messages I got on the terminal:
(griffith:23871): libglade-WARNING **: unknown property `urgency_hint' for class `GtkWindow'
(griffith:23871): libglade-WARNING **: unknown property `pack_direction' for class `GtkMenuBar'
(griffith:23871): libglade-WARNING **: unknown property `child_pack_direction' for class `GtkMenuBar'
Traceback (most recent call last):
File "/usr/bin/griffith", line 98, in get_from_web
add.get_from_web(self)
File "/usr/lib/griffith/add.py", line 261, in get_from_web
self.show_search_results(self.search_movie)
File "/usr/bin/griffith", line 101, in show_search_results
add.show_websearch_results(self)
File "/usr/lib/griffith/add.py", line 226, in show_websearch_results
title = str(self.search_movie.titles[key]).decode(self.search_movie.encode)
File "/usr/lib/python2.4/encodings/utf_8.py", line 16, in decode
return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 4-6: invalid data
I'm using Suse 9.3, python 2.4,