Index: lib/ezfile/classes/ezfile.php
===================================================================
--- lib/ezfile/classes/ezfile.php	(revision 22645)
+++ lib/ezfile/classes/ezfile.php	(working copy)
@@ -213,8 +213,11 @@
             header( 'Content-Type: ' . $mimeinfo['name'] );
 
             // Fixes problems with IE when opening a file directly
-            header( 'Cache-Control: no-store, no-cache, must-revalidate' ); // HTTP/1.1
-            header( 'Cache-Control: pre-check=0, post-check=0, max-age=0' ); // HTTP/1.1
+            header( "Pragma: " );
+            header( "Cache-Control: " );
+            /* Set cache time out to 10 minutes, this should be good enough to work
+            around an IE bug */
+            header( "Expires: ". gmdate('D, d M Y H:i:s', time() + 600) . ' GMT' );
             if( $overrideFilename )
             {
                 $mimeinfo['filename'] = $overrideFilename;