I have installed Viper Quicktags pugin with JWPlayer and I was using CC (embeded caption) in mp4 files to show subtitles to my clips on my online television.
But after I updated WP to 2.8.4, I was not able to make it work again with tons of effort. :((
The player shows the CC logo on the bottom, but the captions is not visible. Anyone who encountered that behaviour, please help!!!