Advertisements I checked just now; GRNHD (1051), IFCHD (1200), HMCHD (1230), and STZCHD (1370) are blank; a message from Tivo on those channels says: "This channel is temporarily unavailable. Press SELECT to tune to this channel again. Contact your cable provider for more information." Sometimes these channels come in just fine, sometimes not. The channels that drop out from time to time vary. Sometimes it's non-HD channels. Rebooting Tivo sometimes fixes it. Is Cox turning these channels off from time to time? Is it a bug in the SVA? Does anyone know why this is happening?