... And there's a problem.
Testing on a second machine, with none of the needed libraries in from MacPorts (oddly, with all of SDL in /Library/Frameworks), yeilds this in the console.log:
...
2010/07/04 19:20:37 Using low resolution globe textures as requested.
2010/07/04 19:20:37 SDL_image version 1.2.10
2010/07/04 19:20:48 SDL_ttf version 2.0.9 - we need at least 2.0.7
2010/07/04 19:20:49 ------- sound initialization -------
2010/07/04 19:20:49 SDL_mixer version: 1.2.11
2010/07/04 19:20:49 ... requested audio rate: 44100
2010/07/04 19:20:50 ... driver: 'coreaudio'
2010/07/04 19:20:50 ... audio rate: 44100
2010/07/04 19:20:50 ... audio channels: 2
2010/07/04 19:20:50 ... could not load ogg vorbis support
...
2010/07/04 19:21:53 M_Start: Could not load music: 'music/van_theme' (Failed loa
ding /opt/local/lib/libvorbisfile.dylib: dlopen(/opt/local/lib/libvorbisfile.dyl
ib, 2): image not found)
...
That error message (a hardcoded library reference) is received on every sound.
2010/07/04 19:22:10 ********************
2010/07/04 19:22:10 ERROR: Invalid version of the mdx file, expected 1, found 16
777216
2010/07/04 19:22:10 ********************
This one I have no clue on.