[Zope] Looping URL's

We've been having a continual problem using Zope to serve as a campus-wide CMS. Non technical people are plaguing the server with malformed references, creating looping URLs that cause our search engine to fall over dead. I presume you all know what I'm talking about... the a/b/a/b/a/b URL's. We've focused on user-training, but we really need to find a way to make the server more bulletproof. I'm considering throwing a call into the template that compares the request URL with the absolute_url and redirects/logs when a discrepancy is found. Does anyone have any comment on this approach, or a better recommendation? --- Edward J. Pollard, B.Sc Webmaster, University of Lethbridge