OSX Lion cannot run lilymidi

[Maccesch]

Hi.

I have the latest unstable Version (2.15.15-1) installed on
OS X Lion. The GUI seems to work fine, but if I try to run
lilymidi from the Terminal I get this error:

Traceback (most recent call last):
  File "./lilymidi", line 237, in <module>
    go ()
  File "./lilymidi", line 218, in go
    midi_data = read_midi (midi_file)
  File "./lilymidi", line 67, in read_midi
    import midi
ImportError:
dlopen(/Applications/LilyPond.app/Contents/Resources/lib/lilypond/
current/python/midi.so,
2): no suitable image found.  Did find:
        /Applications/LilyPond.app/Contents/Resources/lib/lilypond/
current/python/midi.so: mach-o, but wrong architecture

I found a report for this on the web but I haven't found
a solution.