/usr/share/doc/fp-units-gnome1-2.4.4/changelog.Debian.gz is in fp-units-gnome1-2.4.4 2.4.4-3.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/fp-units-gnome1-2.4.4/../fp-units-rtl-2.4.4/changelog.Debian.gz