/usr/share/doc/libqt4-qt3support/changelog.Debian.gz is in libqt4-qt3support 4:4.8.1-0ubuntu4.9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libqt4-qt3support/../libqt4-designer/changelog.Debian.gz