[Zope] document_src broken on this site

[Loren Stafford]

On two of my sites I have the usual view_source method:

=========
<dtml-var standard_html_header>
<pre>
<dtml-var "document_src(REQUEST,RESPONSE)" html_quote>
</pre>
<dtml-call "RESPONSE.setHeader('content-type','text/html')">
<dtml-var standard_html_footer>
=========

On one site (http://www.fippless.org/Quena/view_source) it fails with a name
error on "document_src" (Zope 2.0.1). You can see the traceback by going
there.

On our Intranet site (Zope 2.0.0) it works fine.

I can't imagine what the difference could be, given that document_src is
built into Zope.

Can you?

-- Thanks
-- Loren