The latest CVS version is giving autorization demands (and failures) with this 
DTMLmethod.
This kind of construct used to work fine.

<dtml-var standard_html_header>
<h2><dtml-var title_or_id> <dtml-var document_title></h2>
<p>
<dtml-with "_.namespace(SUB=[1,2])">
<dtml-if "_.len(SUB)>0">non-empty<dtml-else>empty</dtml-if>
</dtml-with>
</p>
<dtml-var standard_html_footer>





        Zope Error

         Zope has encountered an error while publishing this resource. 

         Unauthorized

         Sorry, a Zope error occurred.

         Traceback (innermost last):
           File C:\Python\devel\Zope\lib\python\ZPublisher\Publish.py, line 224, in 
publish_module
           File C:\Python\devel\Zope\lib\python\ZPublisher\Publish.py, line 189, in 
publish
           File C:\Python\devel\Zope\lib\python\ZPublisher\Publish.py, line 175, in 
publish
           File C:\Python\devel\Zope\lib\python\ZPublisher\mapply.py, line 160, in 
mapply
             (Object: xxx)
           File C:\Python\devel\Zope\lib\python\ZPublisher\Publish.py, line 112, in 
call_object
             (Object: xxx)
           File C:\Python\devel\Zope\lib\python\OFS\DTMLMethod.py, line 164, in 
__call__
             (Object: xxx)
           File C:\Python\devel\Zope\lib\python\DocumentTemplate\DT_String.py, line 
500, in __call__
             (Object: xxx)
           File C:\Python\devel\Zope\lib\python\DocumentTemplate\DT_With.py, line 146, 
in render
             (Object: _.namespace(SUB=[1,2]))
           File C:\Python\devel\Zope\lib\python\DocumentTemplate\DT_Util.py, line 327, 
in eval
             (Object: _.len(SUB)>0)
             (Info: SUB)
           File C:\Python\devel\Zope\lib\python\OFS\DTMLMethod.py, line 184, in 
validate
             (Object: xxx)
           File C:\Python\devel\Zope\lib\python\AccessControl\SecurityManager.py, line 
139, in validate
           File C:\Python\devel\Zope\lib\python\AccessControl\ZopeSecurityPolicy.py, 
line 160, in validate
         Unauthorized: SUB
-- 
Robin Becker

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