DOCBOOK: Problem with glossseealso on html generation

[Martin West <martin at enigmatec dot net>]

I have a glossseealso entry in a glossdef ...
        <glossentry>
            <glossterm id="gl-Exchange">Exchange</glossterm>
            <glossdef>
                <para>An Exchange is a Request and its associated
Response.</para>
                <glossseealso otherterm="gl-Request"/>
                <glossseealso otherterm="gl-Response"/>
            </glossdef>
        </glossentry>

        <glossentry>
            <glossterm id="gl-Request">Request</glossterm>
            <glossdef>
                <para>A type of communication from source to target
where no
                    response is guaranteed.</para>
                <glossseealso otherterm="gl-Oneway"/>
            </glossdef>
        </glossentry>
        <glossentry>
            <glossterm id="gl-Response">Response</glossterm>
            <glossdef>
                <para>A type of communication from target to source that
always
                    follows a request.</para>
            </glossdef>
        </glossentry>
This compiles without error and the see also generates an html link but
html anchor point for the glossterm is not generated. 

I tried putting the id on the glossentry but this didn't compile ....
The definition for glossentry doesn't have an id attribute but the
example in
http://www.oreilly.com/catalog/docbook/chapter/book/glossary.html
does albiet the sgml entry has an unquoted id value, which is incorrect
correct?

Any ideas?

Slightly confused ...

Martin West