>I wonder if the file format used in trunk (or rather >the lyx2lyx converter that deals with it) is still >unable to revert back to previous versions' file formats.
What do you mean by unable to revert back ? LyX trunk uses a new file format (of course) and the older LyXes don't know about the new fileformat. Did you try File->Export->LyX 1.6.x ? Vincent
