PHP Notice: register_sidebar_widget in wordpress 3.8.1

[08-Feb-2014 16:56:18 UTC] PHP Notice: register_sidebar_widget is deprecated since version 2.8! Use wp_register_sidebar_widget() instead. in /home/hostings/public_html/wp-includes/functions.php on line 2908
[08-Feb-2014 16:56:18 UTC] PHP Notice: register_widget_control is deprecated since version 2.8! Use wp_register_widget_control() instead. in /home/hostings/public_html/wp-includes/functions.php on line 2908
[08-Feb-2014 16:56:18 UTC] PHP Notice: ob_end_flush() [ref.outcontrol]: failed to delete buffer zlib output compression in /home/hostings/public_html/wp-includes/functions.php on line 2773