/usr/local/lib/python3.3/site-packages/gi/module.py:178: Warning: g_array_append_vals: assertion 'array' failed
  g_type = info.get_g_type()
/usr/local/lib/python3.3/site-packages/gi/module.py:178: Warning: g_hash_table_lookup: assertion 'hash_table != NULL' failed
  g_type = info.get_g_type()
/usr/local/lib/python3.3/site-packages/gi/module.py:178: Warning: g_hash_table_insert_internal: assertion 'hash_table != NULL' failed
  g_type = info.get_g_type()
Traceback (most recent call last):
  File "/usr/local/lib/python3.3/site-packages/gnomemusic/application.py", line 122, in do_activate
    self._window = Window(self)
  File "/usr/local/lib/python3.3/site-packages/gnomemusic/__init__.py", line 44, in wrapped
    retval = fn(*v, **k)
  File "/usr/local/lib/python3.3/site-packages/gnomemusic/window.py", line 90, in __init__
    self._setup_view()
  File "/usr/local/lib/python3.3/site-packages/gnomemusic/__init__.py", line 44, in wrapped
    retval = fn(*v, **k)
  File "/usr/local/lib/python3.3/site-packages/gnomemusic/window.py", line 177, in _setup_view
    self.player = Player()
  File "/usr/local/lib/python3.3/site-packages/gnomemusic/__init__.py", line 44, in wrapped
    retval = fn(*v, **k)
  File "/usr/local/lib/python3.3/site-packages/gnomemusic/player.py", line 97, in __init__
    self.player = Gst.ElementFactory.make('playbin', 'player')
  File "/usr/local/lib/python3.3/site-packages/gi/overrides/Gst.py", line 169, in make
    return Gst.ElementFactory.make(factory_name, instance_name)
AttributeError: 'NoneType' object has no attribute 'ElementFactory'