Ticket #5472: 5472.2.diff

wp-includes/user.php

@@ -85 +85 @@
 
         $userdata = get_userdatabylogin($username);
 
-        if ( !$userdata || ($userdata->user_login != $username) ) {
+        if ( !$userdata ) {
                 return new WP_Error('invalid_username', sprintf(__('<strong>ERROR</strong>: Invalid username. <a href="%s" title="Password Lost and Found">Lost your password</a>?'), site_url('wp-login.php?action=lostpassword', 'login')));
         }