Why don't you just uncheck MIDI support in gnome-mplayer, Edit -> Preferences -> Plugin and then uncheck MIDI support. It should have been disabled by default, at least that is how it ships from me.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/231421 Title: mplayer plugin for firefox can't play midi -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs