Duh, I figured it out… in case anyone else finds this topic of interest:
Utilizing the Fold Page List plugin by Rob Schumann, I am using two separate wp_list_pages calls in the sidebar.php in order to display two separate organization menus, each with its own set of excludes. The page wasn’t validating because the fold_page_list.php inserts an id for each page list called “pagenav”. I fixed it by simply changing the id to a class instead:
$output .= '<li class="pagenav">' . $r['title_li'] . '<ul>';
That should’ve been obvious, but for whatever reason it wasn’t. I hope this can help someone else in the future.
