I was finally able to get a picture and sound using my Nexus-S DVB card under R4V5. I had the card working under Windows using RitzDVB (Good program for any windows users). However, when I tried mythbackend would always crash trying to tune to a channel. I have fixed that problem. It appears that you have to setup each channel manually under
the MYSQL tables for the DVB.

There is a little background. Here are the issues that I have:
1) Video & Audio are not in sync (AMD 950Mhz, 512MB)

2) I launched mythbackend manually from another terminal window to monitor output. here is what I get:

DVB#0 Error - Reading Section
(75) Value too large for defined data type
(This repeats over and over again.)

The channel I was testing is the NASA channel.
I'm think that these two issues are related. But not sure. Any help would be appreciated.