My TivoHD is really slow changing between channels. It takes 3-10 seconds per channel before I see anything on the screen. It says "Searching for Signal on Basic Cable In. See Messages & Settings'/'Troubleshooting' for info." I've done everything mentioned in the troubleshooting menu. Has anyone else seen this issue yet? I don't have an HDTV (yet) and I currently have analog cable through TWC.