/usr/share/autostart/akonaditray.desktop is in kdepim-runtime 4:4.8.2a-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/autostart/../applications/kde4/akonaditray.desktop
/usr/share/autostart/../applications/kde4/akonaditray.desktop