The problem is that ubuntu doesn't add a gstreamer plugin that can handle mp3 by default. If you install gstreamer0.10-fluendo-mp3 from the debian distro it will work (I can never figure out how to tell if that's in Universe or Multiverse).
I tried gstreamer0.8.mad, but it doesn't seem to work with gstreamer0.10. -- Error loading files : not an audio stream https://launchpad.net/bugs/61683 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
