7. Incompatibility with gnome-settings-daemon's media keys plugin >= 3.8
Currently the media keys (along with many other keyboard shortcuts)
don't work, because GSD's media keys plugin expects that the keyboard
events are grabbed by the shell. Related bugzilla tasks:
gnome-settings-daemon: https://bugzilla.gnome.org/show_bug.cgi?id=693016
gnome-shell: https://bugzilla.gnome.org/show_bug.cgi?id=643111
But even if we implement the above, the OSD is not visible on events
(e.g. when set the volume level), because it's also relying on the
shell now. Related bugzilla tasks:
gnome-settings-daemon: https://bugzilla.gnome.org/show_bug.cgi?id=695021
gnome-shell: https://bugzilla.gnome.org/show_bug.cgi?id=613543
Therefore we either need to implement these D-Bus interfaces within
gnome-flashback, or we need to fork somehow GSD's media keys plugin.