DOCBOOK-APPS: wrong sort order of index in HTML

[Michael Wiedmann <mw@miwie.in-berlin.de>]

Using:
- docbook 4.2.cr1
- docbook xsl stylesheets 1.50.0 (default html/docbook.xsl, no customization)
- xsltproc (libxml 20420, libxslt 10016, libexslt 707)

My source document contains a lot of <indexterm>s and at the end of the
document an <appendix> which contains an empty <index>. The XSL stylesheets
generate an index at this place with separated blocks at each character
(marked with a capital character, e.g. 'B').

*But* some of this alphabetical sorted blocks are not sorted in the correct 
order, like

S
T
U
V
A
B
Q
R

Any hints?

Michael
-- 
mw@miwie.in-berlin.de                              http://www.miwie.org
mw@miwie.org