Or why is my dingus click not working?
Your web browsers and mail clients need to handle
"x-scheme-handler/http"[1] and "x-scheme-handler/mailto" respectively
to
be listed in the GNOME default applications in the new control-center.
Once our default applications are setup, I'll make the necessary changes
in shared-mime-info for the applications to be picked up.
See:
http://www.hadess.net/2010/10/new-control-center-and-you.html
and
http://standards.freedesktop.org/shared-mime-info-spec/shared-mime-info-s...
for details.
[1]: And probably x-scheme-handler/https