Subtitles embedded in OGM files

[SˇnT?«??]

subs in an ogm file get delayed 0.8-1.0 secs. It works fine when the files are separate tho (non-muxed). It also works fine embedded with oggsubtitDS, but that isn't nearly as extensive or look nearly as good as bsplayer's subtitle support. So could you plz see what's the problem? I can provide sample video's of the problem.