Problem with MIDI volume level

[Zoltan Selyem]

%% Changes in volume affect all the staves in the MIDI output
%% instead of affecting only the one they are written in.
%%
%% This went wrong between 2.13.52 and 2.13.53

\version "2.13.53"

Upper = \relative c' {
  e8\ppp e e e e\fff e e e | e\ppp e e e e\fff e e e
}

Lower = \relative c' {
  c8\ppp c c c c c c c | c c c c c c c c
}

\score{
  \context StaffGroup
  <<
    \new Staff \Upper
    \new Staff \Lower
  >>
  \layout{}
  \midi{}
}

%%
%% (I'm using Windows XP, if this is important.)
%%
%% Zoltan

midi-volume.png
Description: PNG image

midi-volume-2.13.52.mid
Description: audio/mid

midi-volume-2.13.53.mid
Description: audio/mid