When I enabled debugging I see the following:
Notice: add_custom_image_header is deprecated since version 3.4! Use add_theme_support( ‘custom-header’, $args ) instead. in /mnt/stor13-wc1-ord1/907372/912856/www.42-north.com/web/content/wp-includes/functions.php on line 3378
That line does not exist in my functions.php file :/