I just got off the telephone with Vizio Support. They, in more words than this, said that the issue is on my end and not with the HDTV.@Matt McRae Have you heard reports of Audio Lip sync issues on 24hz signals sent through an AVR to the TV? I know a few of us have mentioned it in this thread and I have opened a support ticket with Vizio regarding the matter. It does not seem to be specific to the AVR or the Device sending the 24hz signal. I can not be certain (need more testing) but it seems to cause a delay in the video appearing on the screen when changing to an input with a 24hz signal. The delay is not huge but is noticeably different then if the devices are set to 60hz.
Edit: If the 24hz signal is connected directly to the TV then no lip sync issues occur. Again I will need to do more testing with the delay in the image appearing on the display.