Ken writes:
Again: External links on my page go to a script which builds the URL and does a RESPONSE.redirect. When the object of the redirect is a PDF, the script does not complete. It looks as if I need to set a content-type header at the same time, but how? I do not know the reason for your problem.
But, I can assert that you do not need to specify a content-type in the redirect. The "Content-Type" in the redirect specifies the content type of the body of the redirect response and not that of the redirected to page. This body is usually something like: "When your browser does not support redirects, please click here to come to the page." I is unlikely that you send a PDF page as body of a redirect.
And, out of curiosity, how does 'contype' get written to Z2.log as useragent for the failed calls? Apparently, your browser sent this value as "User-Agent" in its request.
Dieter