The newest tritonus library that is packaged for Debian is not fully compatible
with jlgui. You need to download an older binary only jar file if you want to
play ogg/vorbis files. Please execute the following commands as root:

mkdir /var/spool/jlgui
cd /var/spool/jlgui
wget http://bollin.googlecode.com/files/tritonus_share.jar