I know everyone hates this when someone chimes in with the same problem but no solution. Maybe the more people that bellyache about it then someone might show pity on us!
I am have the same problem. It is as if the audio and video are being processed by two totally separate entities. I am using Tvserity Pro and I have a D-Link DSM 520 that handles the streaming to the TV and audio (Logitech receiver). Up until just recently, I could stream Hulu content to my TV and the audio would play from my Logitech receiver and home stereo speakers. Now, the audio starts about 20 seconds before the video and it is only coming out of my PC’s speakers. I can FF the video and the audio continues at the same speed (I can actually FF the video so that audio and video are almost synchronized…NOT a SOLUTION though). When I stop the stream, the audio continues and I have to shut down my UPnP device (DSM 520) before the audio will stop. If I am not streaming live content from the internet, rather instead a file from my hard drive, audio is correctly routed to the DSM 520 and to my Logitech stereo system. The problem only occurs with Internet streaming (I have only tried with Hulu).