http://drupal.org/node/303419

From: andrew morton <graveltech@gmail.com>

Incorrect exipration headers with private file transfers
---

 modules/image/image.module |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)


diff --git modules/image/image.module modules/image/image.module
index 5d7d851..6543d3d 100644
--- modules/image/image.module
+++ modules/image/image.module
@@ -207,7 +207,7 @@ function image_file_download($filepath) {
           'Content-Type' => $info['mime_type'],
           'Content-Length' => $info['file_size'],
           // ...and allow the file to be cached for two weeks (matching the
-          // value we use for the mod_expires settings in .htaccess) and
+          // value we/ use for the mod_expires settings in .htaccess) and
           // ensure that caching proxies do not share the image with other
           // users.
           'Expires' => gmdate(DATE_RFC1123, time() + 1209600),