I watch alot of soft subbed shows which usually have the .**bleep** type of subtitle file attached to them, file extentsion is usually .mkv
Anyway with .**bleep** subs you aka the person make the subs can edit the file and place notes on a normal line that wont appear in the subs on the video you place these notes in between ‘{’ and ‘}’ However the WDTV Live shows these notes and doesn’t seem to support some of the more basic typesetting functions that this fantastic subtitle format allows people to do.