In my case with a Samsung d8000 I have problems with subtitles (srt files) some times detect subtitles but if not then is not detected with any files I don’t know what is happen even if select one file than don’t show subtitles, the USB files than show subtitles stop working then I need to turn off TV and on again and then the USB subtitles start to work again. But if select the file from the My book than don’t show subtitles, then start over again. Really sad. All this with the DLNA server. with Twonky don’t show any subtitle and MKV files.