I've just installed 2.13.61 (Windoze binary)
I'm working on a piece with a lot of cross-staff arpeggios, many of which
need their stem lengths/beam positions tweaked for easier reading. The
manualBeam function in the manual
manualBeam =
#(define-music-function (parser location beg-end)
(pair?)
#{
\once \override Beam #'positions = #$beg-end
#})
works perfectly for a few bars, after this the beams and stems of the
beamed note groups are AFAICT rendered inverted top-to-bottom.
A recent bug-lilypond thread suggested that some work had recently been
done on the cross-staff beaming code. Is this still on the to-do list, or
am I missing something? (A workaround?)