[QUOTE=eisenb11;171479]Yep, fab forced subtitle processing cannot be counted on because there are too many ways to handle subtitles. What I do is select all English subtitles then when fab is done I use mkvextract to extract all subs. Then I use subtitle edit to check them out. If the forced subs are in a dedicated stream I then use mkvmerge to edit the header and set the forced flag on that stream. If they are embedded, I extract them into their own stream then use mkvmerge to mux it in with the forced flag set. Bit of a pain but it's the best way I found to always get it right. Forget which tool I use to extract embedded subtitles, I think it's bdsup2sub or something like that.[/QUOTE]
What subtitle format do you use for the final MKV file, I've done this using .srt subs (plain text) and this frequently cause my MKV player (Windows Media center with LAV) to crash when the first subtitles are encountered.