Tag: call to undefined function

Beware if you update to WordPress 2.5 and are using the very popular K2 theme. If you are using K2 and you do update to 2.5, you will receive the following error on trying to browse to your WordPress dashboard: Fatal error: Call to undefined function wp_register_sidebar_widget() in /path-to-blog/wp-admin/includes/dashboard.php on line 31 A bit of…