I've removed all but the original PVR-250 card from my system, and this setup worked fine under R5A15. After the upgrade to R5A16, I went to mythtv setup to configure the card... when I "added" the card, picked from the list that it was a PVR-250, tried to set the "Default Input" but no options showed up.

I read in another post that the this might mean the ivtv drivers aren't loaded, but I didn't need to do that before and am not sure how to do that now.

Is my read on the problem correct? If so, any links on how to fix it?

Thanks!

Ummm...

NEVER MIND!

Just in case someone else has a similar problem, I found the magic post: the solution is here

http://mysettopbox.tv/phpBB2/viewtopic.php?t=4325

I had missed that part of the conversation on my earlier search. Persistence pays!