I'm sure I have the correct configuration for the video capture card... I've been using this one for some time with other video cards with no problem at all, as well as with the nv driver.
The tuner is clearly labeled, so it's hard to select the wrong one.
As I said in the original article, I'm seeing this with two different boards, one of which I've used for many months, the other for many years (I gave my friend my old bt848 card when I got the bt878 card - and just copied the config over to his box).
Thanks for the suggestion though.