page-new.tpl.php shows page not found in browser title The page displays fine, however; the browser tile shows Page Not Found | main title of site.

How can I apply a proper title to this custom page when another page controls the header ?
This will set the title in the actual browser window:

function MYTHEME_preprocess_page(&amp;$variables) {
  drupal_set_title(t('Custom title'));
}