Issue 1285 in lilypond: Erratic spacing between staves

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Critical Regression

New issue 1285 by PhilEHolmes: Erratic spacing between staves
http://code.google.com/p/lilypond/issues/detail?id=1285

With this code:

test = { c' ^\markup { ! }}
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }
\score { \repeat unfold 48 { \test } }

2.12.3 produces well-spaced staves fitting exactly on 2 pages.  2.13.31  
and .34 produce very tightly spaced staves taking less than 2 pages.   
2.13.35 now produces very loosely spaced staves over-flowing onto a 3rd  
page.  See the attached images for comparisons.

Attachments:
        SpacingProb2.12.3.png  7.2 KB
        SpacingProb2.13.34.png  6.5 KB
        SpacingProb2.13.35.png  7.3 KB