I'll try to replicate it later/tomorrow.
[Title-list] menu is the same (and
should act the same way) as the [top-menu] (XMB/SLI/CAR).
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There is no such thing as 'main movie' in multiAVCHD. Each title is a TITLE (movie). The [PLAY] button just activates a title/movie. Title-list menu should do the same.
Dean