Doesn't the line:

   $self->query()->nph(1);
[download]

Do this for me? The docs say that "You can set NPH mode in any of the following ways:" including the above. If I'm having NPH problems, would I be having this problem with all pages, not just redirects and POSTS?

Update: I'm not directly printing out any headers. Only using header_props() and header_add(). In the result runmode I'm not even modifying any headers at all. That's why I'm so baffled.