[Zope] NauSchduler problem

I'm using NauSchduler to automate sending a news digest out twice daily to users of our site. The digest simply has the Subject of the news item and the URL to item on our site. The Script Python that sends the digest works fine when tested alone, but when I run it from NS the URL, gotten from obj.absolute_url(), is replace with the physical path. I see many calls to getPhysicalPath() in the NS source. But, I don't understand why it would overwrite my URL. Has anyone else seen this behavior? BTW, this is the first problem I've had with this product. It's been great for other scheduled tasks. Barry Drake