WP_DEBUG gives this when loading earmilk.com/sitemapindex.xml?generate=1&t=1452844019:
Notice: The called constructor method for WP_Widget is <strong>deprecated</strong>
since version 4.3.0! Use <pre>__construct()</pre> instead. in
/home/www-data/earmilk/public/wp-includes/functions.php on line 3624
WP_DEBUG gives this when loading earmilk.com/sitemapindex.xml?generate=1&t=1452844019:
Relevant discussion: https://wordpress.org/support/topic/notice-wp_widget-is-deprecated-since-version-430
"The issue is the use of deprecated PHP 4 style constructors for widgets: {object}->WP_Widget(), WP_Widget::WP_Widget(), and parent::WP_Widget()."