[Zope] A strange difference between DTMLDocument versus DTMLMethod Zope 2.2.2

The following few lines have a different result, when I execute it within an DTMLDocument or DTMLMethod. <dtml-var standard_html_header> <dtml-in "objectItems('Folder')"> <dtml-var title_or_id> </dtml-in> <dtml-var standard_html_footer> The DTMLMethod result looks like it should be, but within a DTMLDocument the result is empty. When I modify the <dtml-in> tag slightly, then it works to <dtml-in "PARENTS[-1].objectItems('Folder')"> I does not seem to me consistent. Is it a new feature or bug. Beside, when I call the DTMLMethod from another Document, the result is empty to. Thanks Jens