I got a reply from Harmony Customer support and thought I'd share... haven't tried it yet, but it makes sense...
Thanks for the quick replies... while this remote can be a little complicated, the help their customer support provides is first rate. ---------- We are still developing support for HDTV channels and are finding that each manufacturer handles the selection of these channels in a different way. I have a solution (below) which is not very elegant and requires some changes to XML but should work for you:
Modify the XML for your "Watch Television" activity. For each HDTV channel listed you should first add leading zeros to the field to make it 5 digits. Secondly you need to add a line that reads . The finished code should look something like this:
