Graveman won't burn MP3 files

[el toro]

Not sure if this is the same issue, but I installed the latest graveman
(0.3.6) and I can no longer burn mp3s.  When I attempt to add mp3 files
to the burn queue, the file chooser shows that the only valid files are
.wav and .ogg, all mp3 files are greyed out and un-choosable (not a
real word, but what they hey)--what's the deal there?  I remember
happily burning mp3s with the last version of graveman--is this an
issue with sox or one of the libraries, or somehow the intended
behavior given the restricted nature of mp3?


-- 
el toro