/usr/share/doc/gnome-panel/README is in gnome-panel 1:3.8.0-1ubuntu11.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gnome-panel/../libpanel-applet-4-0/README
/usr/share/doc/gnome-panel/../libpanel-applet-4-0/README