beam-rest, rest shift up.

[Némo]

Hello,
I'm using lilypond 2.5.19, typesetting a Stravinsky score, i foud this
problem : the rest in a beam is shift up.
The regretion test (
http://lilypond.org/doc/v2.5/input/regression/out-www/lily-641998816.ly
) is ok but my small part not... Sorry I can explain why, maybe because
it's high (up) note ?

Hope it will help you,
Olivier.

PS : I'm not on this mailing list. Sorry for my poor english, french
speaker welcome for other explanations.

-- 
Olivier <address@hidden>

   \version "2.5.19"
   \paper { #(define dump-extents #t)
              indent = 0\mm
            }
   \score {\relative c''' { a16[ b r16 b] }
            \layout {raggedright = ##t}
            }

\version "2.5.19"
%\include{english.ly}
     melody = \relative c''' {
        \clef treble
        \key c \major
        \time 2/4

        bes8_\markup { 
                        \italic {\bold f d'un bout à l'autre}}^\markup {
                        \column { \line { 
                        \smaller \general-align #Y #DOWN \note #"8" #1
                        "=160," 
                        \smaller \general-align #Y #DOWN \note #"16" #1
                        "="
                        \smaller \general-align #Y #DOWN \note #"16" #1"        
                
                        "sempre" } " " } }
aes16( bes) aes \acciaccatura aes16( bes8) aes16( |
        bes8-.) g16-. a!-. c32([-> b! a16) g-. b-.] |
        g \acciaccatura aes( bes8) \times 2/3 {aes32( bes aes}  bes16 g-.) a!( 
cis) |
             

% ligne 2, mesure 4
        \time 5/16 \times 2/3 {b32[->( cis b} a16 g-.) b-. g-.] |
        \time 3/16 b,->\<[( g'-.\!) b-.] |
        \time 3/8 a->\>[( b-.\!]) ais->\>[( b-.\!]) r8 \breathe |
        \time 2/8 \grace {e,16[( a!]} b8[)  a16->\>( b-.\!]) |
        \time 3/8 ais->\>[( b-.\!]) r16 \breathe b,->[( g'-.) b-.]  |
 
% ligne 3, mesure 9
        \time 3/4 \times 2/3 {a!32( b a} gis16) b,-. gis'->( b) b,->\>( ais'-.) 
bis-.\! ais->[( bis-.) r16 \breathe bis->] (
        \time 2/4 bis) cis( d-.) cis-. c-. b-. b,-. b'-. |
        \time 3/8 bes->\>( c-.\!) r16. \breathe d32[( fis16-.) r32 d32]( |
        
% ligne 4, mesure 12
        a16[) r32 c32( e16-.) r32 cis32( a16-.]) r16 |

}
     
     \score {
        \new Staff \melody
        \layout { }
        \midi { \tempo 8=160 }
     }