Ticket #18043: 18043.patch

wp-includes/ms-files.php

@@ -39 +39 @@
         $mimetype = 'image/' . substr( $file, strrpos( $file, '.' ) + 1 );
 
 header( 'Content-Type: ' . $mimetype ); // always send this
-if ( false === strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS' ) )
-        header( 'Content-Length: ' . filesize( $file ) );
 
 // Optional support for X-Sendfile and X-Accel-Redirect
 if ( WPMU_ACCEL_REDIRECT ) {