[xml/sgml-pkgs] Bug#482140: Bug#482140: docbook-xml: Package does not install: update-xmlcatalog: error: entity, already registered

[Alexander Strange]

I experienced the same thing going from a freshly-installed etch to
lenny on ppc, so it's not limited to amd64. 

Running:
update-xmlcatalog --del --type public --id '-//OASIS//DTD DocBook XML
V4.1//EN' --package docbook-xml
update-xmlcatalog --del --type public --id '-//OASIS//DTD XML Exchange Table Model 19990315//EN' --package docbook-xml

did in fact fix it.

This wasn't on a VM, so unfortunately I can't go back and reproduce it.