Action <bound method ThumbnailManager._generate_thumbnail_for_widget of <elisa.core.thumbnail_manager.ThumbnailManager instance at 0xab3224ac>>((<bound method MusicTreePlugin.get_folder_thumbnail of <MusicTreePlugin instance at 0x-4ad81a94 'Musique': music>>, 'meta://artist:list', <WidgetItem caption='By Artist' bg=<image.Image(file='/home/phil/devel/elisa/trunk/elisa/core/plugins/skins/default/pictures/256X256/folder-music.png')>>, 256)) failed
Traceback (most recent call last):
  File "threading.py", line 442, in __bootstrap
    self.run()
  File "threading.py", line 422, in run
    self.__target(*self.__args, **self.__kwargs)
--- <exception caught here> ---
  File "/usr/lib/python2.4/site-packages/twisted/python/threadpool.py", line 148, in _worker
    context.call(ctx, function, *args, **kwargs)
  File "/usr/lib/python2.4/site-packages/twisted/python/context.py", line 59, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
  File "/usr/lib/python2.4/site-packages/twisted/python/context.py", line 37, in callWithContext
    return func(*args,**kw)
  File "/home/phil/devel/elisa/trunk/elisa/core/utils/deferred_action.py", line 69, in _main_loop
    self._execute_task(task)
  File "/home/phil/devel/elisa/trunk/elisa/core/utils/deferred_action.py", line 86, in _execute_task
    raise e
exceptions.AttributeError: 'Image' object has no attribute '_pil_object'