[Zope] Using aquisition inside a dtml method of a product ?

[Andreas Jung]

Inside a product my index_html is set to 
   
   "index_html=HTMLFile('index_html',globals())"

The index_html.dtml calls <dtml-var standard_html_header>. This DTML method is
available in the top-level hierarchy. However When I call index_html Zope
complains with a KeyError/standard_html_header.  When I remove the "<dtml-var
standard_html_header>" call everything works fine.

Any idea why aquisition won't work in this case ?

Andreas