Hi i'm using MPlayer-1.0rc1 <http://www3.mplayerhq.hu/MPlayer/releases/MPlayer-1.0rc1.tar.bz2> builded with scripts and patches from http://slackbuilds.org/repository/12.0/multimedia/MPlayer/ and the subs from mkv files get weird behavior, most of them are skiped the others are outsynced, although they work fine with xine. (excuse my bad english)