As I've said, the results are not the best allways. But it's posible to have that problem because of the encoder who used in matroska container a stream compressed in x264 but using VfW profile.
Here you can download lates build, 1.0.2.9
http://www.free-codecs.com/download/...FilterPack.htm http://www.afterdawn.com/software/vi...a_splitter.cfm
But as the subtitles are in VobSub format, you can also allow it to display the subtitles . I know it's not a good solution, but for the moment...