After reading this thread, I tuned to ShoHdW but had no problems. kept returning to it during the day and, still, no problems.
In fact, I have not had any problems with any of the HD channels.
But I do like to watch Headline News and have constant blackouts, stuttering et al on that channel, but not on neighboring CNN. And there is often a breakup extending the entire width of the picture on many of the SD channels, although I rarely watch them other than the news channels.
Go figure.
But I am one of the "rain faders" and am still waiting for Voom to replace my dish with a larger one.
No lockups at all since the repair to the software upgrade. It's great to be able to use the Info button and full guide again.
Shelly