It would be useful to be able to go back in time with the Guide maybe 24 hours to try to figure out why a program didn't record. Was it scheduled? If it wasn't, I would want to enter a Pass for it, which is much more difficult if I have to forward a whole week to find the next episode. Speaking of which, is there a way to skip forward, say, a day at a time on the guide rather than a show at a time?
This may be a limitation of the licensing agreement with Gracenote. (I know that Schedules Direct—another distributor of Gracenote data—specifically disallows caching of previous guide data.)
In the client apps, no; only in the DVR web UI.
As far as keeping stale guide data it was mentioned previously that gracenote doesn't allow them to do that.
You can go back a day in listings at zap2it TV Listings- Find Local TV Listings and Watch Full Episodes - Zap2it.com which uses the same gracenote listings that Channels DVR uses.
You can select a day and time in the DVR web UI grid guide.
I see racameron beat me to it while I was typing
The HDHR app also does not allow previous guide data.
I use M3U/XMLTV from Channels on SageTV and it keeps previous guide data .... comes in handy.
On the guides of our TiVos, I often page back to a show I know WAS on but missed recording to see if/when upcoming shows would be on. I can also use it to fill in missing or truncated metadata in the Channels library.