Please excuse my english. I just picked up the 50" from local BB, however I am noticing 2 problems.
1. I connected my sony ht-ct660 soundbar to my new vizio TV via HDMI1 (ARC). Input sounds from coaxial cable and my roku3 (HDMI) pass through to my soundbar fine. But when I connect my macbook pro via mini displayport to HDMI on TV, I can only send sound to TV but won't pass through to soundbar. Didn't have this problem on M3d470KDE. Current solution: instead of connecting my macbook to TV, i just connect it to my soundbar, which then pass video signal to my TV.
2. No more manual options to select 3D format on HDMI. Cust rep told me that TV will automatically detect 3D contents. I used to play 3D SBS video files and merge them on TV, now it's no longer possible. I am very new to this, so I am still figuring out the solutions to this problem. I probably need to find a way to convert the files to something that vizio can detect as 3D.
Other than that,, this TV is excellent.