Nope. Using driver 2.0.48.24227 downloaded from Hauppauge. Installed the registry hack, restarted and the problem continues. Actually it happens in all channels in Live TV, the sound is delayed by about 10 seconds from the video. WinTV works without problems.
I recalled having similar problems with my old AIW 9600 Pro when I upgraded a version of catalyst once that had switched drivers from analog to digital, although was not that bad. I had to return to WDM drivers and stayed with them until the TV tuner died.
Well, it seems that the only audio decoder that solves the synchronization delay is Nero Digital with a couple of other video decoders (did not test all combinations). However the audio is not totally clear, it gets slightely interrupted from time to time and resumes not loosing synchronization. Right now I am leaving it paired with Nero Video decoder.