Only that I initially did the DTV scan on the 921 and picked up a bunch of digital signals. I mapped those offline to what they were supposed to be. Then, I deleted the non-relevant ones. I then looked for the ones I was missing, found the correct frequency, and manually added those channels. Now all of them appear in my channel guide, in the right spot. They all *seem* to have the proper info in the channel guide.
I now have only one issue - really unrelated to the channel guide. Last night I was getting sporadic drops in reception on my OTAs through the 921. The 921 handled the first couple OK, showing some pixalation and sometimes a brief black screen. However, after a couple of those, it then pretty much just locked up and needed to be rebooted to get it back. This happened several times last night.
Winds were high here last night, and I don't have my antenna configuration optimized yet, so I'm not sure what was going on. I need to do a bunch more research. I called Dish (waited on hold LONG time) and got very little satisfaction. I don't expect them to solve the reception issue, but having the 921 lock up is completely unacceptable. This could have some major impact down the line.