--- index.php   2008-05-18 18:12:32.000000000 -0400
+++ index.php   2009-06-04 21:17:50.000000000 -0400
@@ -1095,7 +1095,7 @@
        @header( "Content-Description: File Transfer" );
        @header( "Content-Type: application/force-download" );
        @header( "Content-Length: {$filesize}" );
-       @header( "Content-Disposition: attachment; filename={$response["f_path"]}" );
+       @header( "Content-Disposition: attachment; filename=\"{$response["f_path"]}\"" );

        // sending the file
        readfile( $path );