Index: index.php
===================================================================
RCS file: /cvsroot/moodle/moodle/login/index.php,v
retrieving revision 1.129.2.3
diff -u -r1.129.2.3 index.php
--- login/index.php	18 May 2008 21:26:57 -0000	1.129.2.3
+++ login/index.php	4 Feb 2009 13:08:37 -0000
@@ -273,7 +273,11 @@
     }
 
     if (empty($frm->username) && $authsequence[0] != 'shibboleth') {  // See bug 5184
-        $frm->username = get_moodle_cookie() === 'nobody' ? '' : get_moodle_cookie();
+        if ($_GET["username"]) {
+            $frm->username = $_GET["username"];
+        } else {
+            $frm->username = get_moodle_cookie() === 'nobody' ? '' : get_moodle_cookie();
+        }
         $frm->password = "";
     }