Installing "gstreamer0.10-plugins-ugly" has solved the problem. But the question remains why Listen requires this package for playing MP3 while Totem doesn't need it.
(And if really needed, it should be automatically requested for installation when trying to play an MP3 the first time.) -- Listen Music Player fails to play MP3 files https://bugs.launchpad.net/bugs/402675 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
