Comment 23 for bug 256131

I analyzed this and the Debian bug, and they indeed have the same root cause, although the bug manifests itself a bit differently on hardy->intrepid, since docbook-xml has the same version as in hardy, and we change scrollkeeper to rarian-compat.

This recipe reproduces it in Ubuntu in a clean hardy pbuilder:

apt-get -y --force-yes install docbook-xml gpgv scrollkeeper
sed -i 's/hardy/intrepid/g' /etc/apt/sources.list; apt-get update
apt-get -y -d install perl-modules rarian-compat
cd /var/cache/apt/archives
dpkg --unpack perl-modules_5.10.0-*.deb
dpkg --unpack rarian-compat_*.deb
# -> BEGIN failed--compilation aborted at /usr/sbin/update-xmlcatalog line 124.
apt-get -f install
# -> update-xmlcatalog: error: entity already registered