I'm using MythTV v0.27 on FC20, and haven't been able to get new listings for several days now. I haven't changed anything about my setup, but now I'm getting the following error whenever I try.
2015-08-10 12:09:48.881795 E DataDirect: Failed to get data: Download error
2015-08-10 12:09:48.881800 E Encountered error in grabbing data.
2015-08-10 12:09:48.982701 I Updating source #2 (DD) with grabber tv_grab_na_dd
2015-08-10 12:09:48.982899 I No channels are configured to use grabber.
I was getting listings fine through Friday afternoon.