My guide has always been set to show both HD and SD channels. I decided to change the Guide Format to show HD channels only. I went to Menu-8-1, selected HD Only under Channel Preferences, and saved the setting. However, when I look at my guide I still see both HD and SD channels. SD only channels are obviously not a problem. Additionally I set No under Banners. But the banners still show up on all channels that display them. My firmware version is L7.21. I've tried undoing/redoing the settings several times and I've done several hard reboots. Nothing seems to work.