Hi.

Apparently the package contained the file:
  /etc/xdg/autostart/xscreensaver.desktop
as conffile during bookworm, but no longer does so in trixie.

It was however not properly unregierstered as dpkg conffile:
# dpkg-query --showformat='${Package}\n${Conffiles}\n' --show  |  awk '/^[^ ]/{pkg=$1}/ obsolete$/{print pkg,$0}' | cut -d ' ' -f 1-3 | column -t
xfce4-session  /etc/xdg/autostart/xscreensaver.desktop


Could you please do so using the maintainer helper scripts in some future
version? :-)

Thanks,
Chris.