I went to preview a song, and a message came up asking if I wanted to see the log. Then it closed. I have no idea if this works on any song.

This happened on Windows XP using FoFiX 4.0 alpha.

Fixed in https://github.com/stump/fofix/commit/dc1b9a7729a31ee02cef57a50bf3d52efd7259f2

This should appear in the next alpha release.