Changing %u (and %U) does indeed solve the problem here. At least until "preferred applications" is opened again.
The %u (and %U) are found in the following keys (rest keeps %s): * about * http * https * mailto (this one has %U) * unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/800927 Title: setting thunderbird as preferred email application corrupts "Launch Web Browser" shortcut To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/800927/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs