For those fellow TiVo users who use Antenna only...
Did you notice that the local KOB affiliate changed the digital station from 4.1 to 12.1? I wasn't getting any information on my guide under 4.1 but once I did another channel scan, I noticed that 12.1 said "local NBC affiliate" so I added 12.1 to my guide and it's now showing the shows from NBC.
106 Ultra HD
19 HD DVD