CAVLC vs CABAC

I Want to know the difference I use to use quicktime movie rendering H264 to watch my home videos on my Samsung TV, but with this new update I cannot use the compressor settings I custom made, on compressor 4.1, and now with 4.2 it does not work it tells me I am using the wrong format when I have not change any format only when I updated the to 4.2 is that I cannot watch my videos on my samsung I do change the format from MOV to mp4 but it use to work fine now it does not....