Download Count export does not work with mod_fcgid + php cgi in a standard configuration

Haha, no no, it didn't download in the browser, unless you've found a way to download files to the user's hard drive without notifying the user at all.

It's a Drupal message, like a drupal_set_message() message. And no popup or download actually occurs.

Nope, not that. I just checked on a different server and, guess what, works okay. Your thing looks like it writes a file first and then opens/sends that? I think the file may not be successfully written on my production server's temp dir or something. Looking deeper.

So the headers look very different on the two servers, which is to be expected, but I don't know if there's something clearly on the non-working one that's not getting set right. I'm running it by my server people (that is, Acquia) as well.

Here's what I get in terms of headers on my working server:

HTTP/1.1 200 OK
Date: Thu, 19 May 2011 19:44:41 GMT
Server: Apache/2.2.17 (Ubuntu)
X-Powered-By: PHP/5.3.5-1ubuntu7.2
Last-Modified: Thu, 19 May 2011 19:44:41 +0000
Cache-Control: no-cache, must-revalidate, post-check=0, pre-check=0
Etag: "1305834281"
Content-Disposition: attachment; filename="download_count_export_fullbroganmasterclass.mp3_2011-05-19.csv"
Content-Length: 94585
CacheControl: no-cache
Pragma: no-cache
Expires: -1
Keep-Alive: timeout=15, max=99
Connection: Keep-Alive
Content-Type: application/csv; charset=utf-8

And here on the non-working (our production) server:

HTTP/1.1 302 Found
Server: nginx
Content-Type: application/csv; charset=utf-8
Cache-Control: no-cache, must-revalidate, post-check=0, pre-check=0
Etag: "1305834311"
Content-Disposition: attachment; filename="download_count_export_fullbroganmasterclass.mp3_2011-05-19.csv"
CacheControl: no-cache
Pragma: no-cache
Expires: -1
Last-Modified: Thu, 19 May 2011 19:45:11 GMT
Location: [[SNIPPED]]
X-AH-Environment: prod
Content-Length: 94756
Date: Thu, 19 May 2011 19:45:12 GMT
X-Varnish: 1008017494
Age: 0
Via: 1.1 varnish
Connection: keep-alive
X-Cache: MISS