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I have found a subtitle file, which format is unsupported by mplayer but e.g. microdvd can play it. this one is supported by mplayer's microdvd parser, only it's not autodetected ( change your first line in subtitles into : {400}{1}Svìt se zmìnil. and it'll work). It'll be fixed in cvs.

It works! :)) Thanx! Roman