2014-02-28, 10:47
XBMC currently doesn't remember the last used 3D mode of a movie. If you like to watch movies in SBS in general, then go to settings -> video -> playback and set your "preferred playback mode" to "preferred 3D mode" and then set the "preffered 3D mode" in "settings -> system -> video" to "SBS". The preferred 3D mode setting is split from video playback because there might be support for 3D pictures later on and the preferred mode would affect both.