Problem with \markup

[Till Rettig]

Hi, what is happening here? The first bar shows the version that a want, 
the second then adds some markup text -- and screws the rest totally up!

Greetings
Till

%%%%%%%%%%
%EXAMPLE
%%%%%%%%%%

\version "2.11.33"
u = { \change Staff = upper  \stemDown \slurDown }
m = { \change Staff = lower \stemUp  \slurUp   }
sdown = {\stemUp \slurDown }
sup = {\stemUp \slurUp }
smid = {\stemDown \slurDown }


bass= \relative c {
\set tupletSpannerDuration = #(ly:make-moment 1 4)
\set subdivideBeams = ##t
\set Voice.beatLength = #(ly:make-moment 1 8)
\times 2/3 {\stemUp r16 e,[\( b' g' \u b e] a[ g e\) \m \clef violin 
ais\( b e] \u fis g b } e8\) \m
\clef bass
\times 2/3 {\stemUp r16 e,,,,_\markup{ \small \italic "m. g."}[\( b' g' 
\u b^\markup{ \small \italic "m. d."} e] a[ g e\) \m \clef violin 
ais_\markup{ \small \italic "m. g."}\( b e] \u fis^\markup{ \small 
\italic "m. d."} g b } e8\) \m }

\score {
   \new PianoStaff { << \new Staff = "upper" \new Voice { \clef treble 
\time 6/8 s4 s s s s}
                   \new Staff = "lower"  \new Voice {\clef bass \bass }
                  >> }
       }