Same problem with the new GeForce 210, and i'm on 190.42. Since the HDMI audio isn't working yet i'm using the DVI output + analog soundcard output, but it must still be sending audio data over the DVI as my TV will not play the analog audio. Previous card was an 8500GT which worked perfectly with the same cabling setup. TV is a Samsung LN52A650.
I will also note that I figured this out by plugging in headphones to the analog sound jack which plays audio fine. And then powered on/off/changed inputs on my tv a few times until finding this and the above threads.