openjade not UTF-8 ready

[Robert Sander]

openjade complains about UTF-8 characters but processes Latin1 without error:

gurubert@sperry:/tmp/doc$ docbook2html -o html -u Index.docbook
Using catalogs: /etc/sgml/catalog
Using stylesheet: /usr/share/docbook-utils/docbook-utils.dsl#html
Working on: /tmp/doc/Index.docbook
openjade:/tmp/doc/Index.docbook:9:47:E: non SGML character number 159
openjade:/tmp/doc/Index.docbook:52:43:E: non SGML character number 132
openjade:/tmp/doc/Index.docbook:52:45:E: non SGML character number 150
openjade:/tmp/doc/Index.docbook:52:47:E: non SGML character number 156
openjade:/tmp/doc/Index.docbook:52:49:E: non SGML character number 159

gurubert@sperry:/tmp/doc$ recode utf8..latin1 Index.docbook

gurubert@sperry:/tmp/doc$ docbook2html -o html -u Index.docbook
Using catalogs: /etc/sgml/catalog
Using stylesheet: /usr/share/docbook-utils/docbook-utils.dsl#html
Working on: /tmp/doc/Index.docbook
Done.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: openjade 1.4devel1-19build1
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Fri Oct 21 09:25:19 2011
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
 LANGUAGE=en_US:en
SourcePackage: openjade
UpgradeStatus: Upgraded to natty on 2011-09-07 (43 days ago)