From what I have seen Mr Gannet, that is pretty much SOP for running a digital setup right now. It may mean that your signal is not 100% all the time, but it just seems to go with the territory.
The message I got from the quote I started the thread with is that now is not a good time to buy an 'HD Ready' set, since the HD standard has yet to be established, and may be higher than some sets are capable of.