Sorry, Petri, but we need to undo these changes, because:

- they could break accounts in existing installations
  - strtolower can corrupt strings in multibyte languages

Is it really a problem that usernames are case sensitive on PostgreSQL?

lib/moodlelib.php

@@ -484,8 +484,6 @@ function create_user_record($username, $password) {
 /// Creates a bare-bones user record 
     global $REMOTE_ADDR, $CFG;
     
-    $username = strtolower($username);
-    
     if (function_exists(auth_get_userinfo)) {
         if ($newinfo = auth_get_userinfo($username)) {
             foreach ($newinfo as $key => $value){

user/edit.php

@@ -43,7 +43,6 @@
 /// If data submitted, then process and store.
 
 	if ($usernew = data_submitted()) {
-        $usernew->username = strtolower($usernew->username);
         $usernew->firstname = strip_tags($usernew->firstname);
         $usernew->lastname  = strip_tags($usernew->lastname);