This sounds much like bug 952933, which was fixed a few days ago. The gvfs-mounts output shows that the media-player-info side is correct ("themed icons: [multimedia-player]"). Can you please update to the latest precise packages and check if this still happens?
** Changed in: nautilus (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/975133 Title: Sylvania SMPK4444 Mp3 player tries to open as Photo CD To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/975133/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs