Unequal spacing in odd-n tuplet with other simultaneous subdivisions

[James Harkins]

Known issue? I'm seeing a strange problem with unequal spacing in the
third staff's septuplet.

The spacing is mostly better if I remove the first staff, and the
problem doesn't reproduce at all if I remove the first bar in all
three staves. I apologize that the example is a bit longer than
"tiny," but the issue seems to depend on a/ enough music so that
lilypond will try to compress the music onto one system and b/ enough
conflicting subdivisions to mess around with the spacing. This is as
small as I could get it. (Someone else could probably make a smaller
example, but I suspect that exercise would depend on more intimate
knowledge of LP's spacing algorithms than I have.)

\version "2.16.1"
\include "english.ly"

\score {
  <<
    \new Staff \relative c'' {
      \key g \major
      e4 r8 d'8 ~ d4 ~ d16 g, a b
      c4 ~ c32 b a g a g fs e fs8 ~ fs32 d e fs g4
    }
    \new Staff \relative c'' {
      \key g \major
      fs8. g16 c,4 ~ c8 r8 e4 ~
      e8 fs16 g \times 2/3 { fs8 [ g ] a4 b4 } c4
    }
    \new Staff \relative c' {
      \clef bass
      \key g \major
      a8 [ b ] ~ b [ r16 e16 ] \times 4/5 { fs16 [ e d c b ] } c8. b16
      \times 4/7 { a8 [ g16 fs e d c ] } d8. c16 b c d8 e4
    }
  >>
}

hjh