Clarity of Comedy Central has improved somewhat. Even now the 4:3 sd channel is showing in 16:9 screens with black bars. It's possible to get full screen in widescreen hdtv if you change sd video aspect ratio to 'center cut' in stb settings. Unfortunately normal 4:3 full screen sd channels will go out of screen in that setting. So you will need to manually change settings for each channel but improvement in viewing experience is worth it.