Install gst-plugins-0.8.2-14 and gstreamer-0.8.3-9 on OS X 10.3 from the Fink unstable tree.

The (seemingly essential) library /sw/lib/libgstinterfaces-0.8.0.dylib is missing, preventing several 
plugins from loading, including osxaudiosink.  During gst-register (with debug level=5 output), you get 
output like this:

 DEBUG (1090345632:074775) GST_PLUGIN_LOADING(18499) gstplugin.c(320):gst_plugin_load_file: 
attemp
t to load plugin "/sw/lib/gstreamer-0.8/libgstosxaudio.so"
DEBUG (1090345632:077407) GST_PLUGIN_LOADING(18499) gstplugin.c(416):gst_plugin_load_file: 
Error 
loading plugin /sw/lib/gstreamer-0.8/libgstosxaudio.so, reason: dlcompat: dyld: /sw/bin/gst-regis
ter-0.8 can't open library: /sw/lib/libgstinterfaces-0.8.0.dylib  (No such file or directory, err
no = 2)

There are also some undefined symbols errors that need fixing:

DEBUG (1090345632:086429) GST_PLUGIN_LOADING(18499) gstplugin.c(320):gst_plugin_load_file: 
attemp
t to load plugin "/sw/lib/gstreamer-0.8/libgstoptomegascheduler.so"
DEBUG (1090345632:090794) GST_PLUGIN_LOADING(18499) gstplugin.c(416):gst_plugin_load_file: 
Error 
loading plugin /sw/lib/gstreamer-0.8/libgstoptomegascheduler.so, reason: dlcompat: dyld: /sw/bin/
gst-register-0.8 Undefined symbols:
/sw/lib/gstreamer-0.8/libgstoptomegascheduler.so undefined reference to _g_log_domain_gstreamer 
e
xpected to be defined in a dynamic image

Full gzipped output of gst-register command is at http://dely.conio.net/errant.gz