Ticket #61025: user.php

Index: wp-includes/user.php
===================================================================
--- wp-includes/user.php        (revision 57483)
+++ wp-includes/user.php        (working copy)
@@ -2371,7 +2371,18 @@
                if ( $user_email !== $old_user_data->user_email || $user_pass !== $old_user_data->user_pass ) {
                        $data['user_activation_key'] = '';
                }
-               $wpdb->update( $wpdb->users, $data, array( 'ID' => $user_id ) );
+
+               $data_changed = false;
+               foreach ( $data as $key => $value ) {
+                       if ( isset( $old_user_data->{$key} ) && $old_user_data->{$key} !== $value ) {
+                               $data_changed = true;
+                               break;
+                       }
+               }
+
+               if ( $data_changed ) {
+                       $wpdb->update( $wpdb->users, $data, array( 'ID' => $user_id ) );
+               }
        } else {
                $wpdb->insert( $wpdb->users, $data );
                $user_id = (int) $wpdb->insert_id;