Gradebook

When you try in Moodle 1.5.3 (in IE6) to download grades from the gradebook in textformat, it fails. Adding these lines in /grade/lib.php to the headerblock for .txt at line 1268  solves here the problem.

1268:       header("Expires: 0");
               header("Cache-Control: must-revalidate,post-check=0,pre-check=0");
               header("Pragma: public");