Add stereoscopic subtitles support for overunder video and anamorph stereo videos (half overunder and half side-by-side) selectable in subtitle settings.
Example of subtitle placement can be found here: http://3dvision-blog.com/7170-using-gom-player-for-3d-video-playback-with-subtitles-on-3d-hdtvs/
overunder subtitle placement
half side-by-side subtitles