if you install the ipkg of mt-daapd it automatically installs the tremor version of ogg-vorbis-dec.
I loaded Unslung onto the Slug instead of debian, and then installed the svn ipkg. Scanning was unsuccessful, even after checking the permissions on the shared music directory were correct. Finally I figured out that the permissions on the parent directories of the music directory were not set properly so Firefly couldn’t get to the music directory. After fixing that everything seems to be working.
Thanks for the help!
(I wonder if the documentation should caution people to check the permissions on all the parent directories of the music directory?)
Perhaps. The default location (mp3 in public) has correct permissions, but probably that should be noted.