Is the Do Not Disturb feature broken? Is this widely known? When I turn mine on (scheduled) on my iPhone 4S my favorites cannot call in still! (Even though I have them exempt from DND). If DND is on it acts like my phone is muted for ALL contacts... a useless feature to me. I want my Favorites to be able to still call in. I had found the issue on apples forums but have seen nothing official. Is this a known bug?