Logs didn't show anything special. So I'll have to try to trigger those crashes by myself also. Are you sure that those crashes aren't also happening with the unmodified TsReader?
I have now tested with the plain tsreader.ax - and also produces missing audio when zapping. Also a recurrence of the "infinite nvidia icons" is seen under certain circumstances (will do a bug report in the proper thread). No conclusions about crashes - I will continue testing.
Edit: Changing channels between audio: mpeg1 and mpeg2 channels on same card repeatedly crashes plain tsreader.
Regards
Seidelin