I still can't reproduce this but I think I found the problem `/usr/share/applications/audacious.desktop` has MIME-type 'inode/directory'. Someone in #ubuntu-mate IRC channel had the same issue and purging Audacious restored the correct behaviour.
** Also affects: audacious (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1393650 Title: Selecting folders in Places Menu opens Audacious To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1393650/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs