I had trouble downgrading, not sure why.  Will investigate.

But I did install 3.41.23-1 and got this message:
  "Warning: link is probably looping, type unknown, aborting"

The page in question is accessed through a form. The form appears on the page
served on the very same URL, path and query, in response to a GET request. 
That form uses the POST method and is submitted by a click on an javascript
href anchor.

I was trying to mirror the site, but httrack didn't get from the parent to the
child through the javascript-form "link".  That's why I was trying to use
catchurl directly on the child.

Confusing.