[mythtv-users] Guide 'Unknown' channels

[Kirby Bakken]

I receive all the 'major' (CBS, ABC, NBC, Fox, etc) channels on HD (I 
have just an HD5000 card), but for most of the HD channels I get, the 
guide shows 'unknown' as the content.  I KNOW that the HD content is the 
same as the NTSC content...  How can I cause the channel guide to show 
content instead of Unknown?  Is there something I'm doing wrong with my 
channel guide setup?  (all the other channels show up fine).  Or do I 
need to 'fudge' things and associate one channel's information that I AM 
getting with the 'unknown' channels?