I use nCAM HD (http://www.lyngsat.com/packages/n.html), and on all PPV channels the tuner looses from time to time for a second or so their proper decoding. It happens with previous and latest driver (v. 1.0.2.6).
Here is an example screenshot from DVB Viewer:
I have also TT S2-3200 CI and it works correctly with the CAM module.
Another issue: DVB Viewer crashes when closed if the current channel is HD.
Any solution?