X-Sendfile שומר cache?

[GNS]

זה הקוד שאני משתמש בו:

<?php
$filename=....
$file_url=.....

header("Pragma: public"); 
header("Expires: 0");
header("Content-disposition: attachment; filename=\"".$filename."\""); 
header("Connection: close");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
header("Cache-Control: private",false);
header("Content-Type: application/octet-stream");
header("Content-Description: File Transfer" );
header("Content-Transfer-Encoding: Binary");
header("Accept-Ranges: none");
header("X-Sendfile: ".$file_url);

?>

בhttpd.conf מוגדר:
XSendFileIgnoreEtag on

ותוצאות השליחה:

Array ( [wrapper_data] => Array ( [0] => HTTP/1.1 200 OK [1] => Date: Sat, 08 Sep 2012 12:27:48 GMT [2] => Server: Apache/2.2.3 (CentOS) [3] => X-Powered-By: PHP/5.3.3 [4] => Pragma: public [5] => Expires: 0 [6] => Content-disposition: attachment; filename="[the filename]" [7] => Connection: close [8] => Cache-Control: must-revalidate, post-check=0, pre-check=0 [9] => Cache-Control: private [10] => Content-Description: File Transfer [11] => Content-Transfer-Encoding: Binary [12] => Accept-Ranges: none [13] => X-Powered-By: PleskLin [14] => Last-Modified: Wed, 04 Jul 2012 22:45:13 GMT [15] => ETag: "3c08018-4f5d5d-4c408c8b61040" [16] => Content-Length: 5201245 [17] => Content-Type: application/octet-stream ) [wrapper_type] => http [stream_type] => tcp_socket/ssl [mode] => r [unread_bytes] => 7584 [seekable] => [uri] => [the url]

כדי לבדוק שלא מדובר במטמון מהדפדפן שלי, השתמשתי בכמה דפדפנים שונים ואפילו במחשב שונה ועדיין זה מוריד קובץ אחר בכלל.