Bug in beatLength processing in 12/16 time?

[Trevor Daniels]

The recent note to -user from Matt Huber (24 Nov 07 20:27)
suggests there is a bug with the automatic beaming of 16th
notes in 12/16 time when beamLength is set to 2 or 3.
Here's a minimal example:

{
  \time 12/16
  \set Score.beatLength = #(ly:make-moment 1 16 )  % Correct
  b16 b b b b b b b b b b b
  \set Score.beatLength = #(ly:make-moment 2 16 )  % Wrong
  b16 b b b b b b b b b b b
  \set Score.beatLength = #(ly:make-moment 3 16 )  % Wrong
  b16 b b b b b b b b b b b
  \set Score.beatLength = #(ly:make-moment 4 16 )  % Correct
  b16 b b b b b b b b b b b
  % All higher beatLengths give correct beaming
}

Maybe I missed something in auto-beam.scm, but I can see
nothing there which affects the beaming of 1/16th notes in
12/16 time.  Same fault in other time signatures too - I
tried 11/16 and 13/16 with same results.

Trevor Daniels