mrqq

Unfortunately, theme author is long gone.. 🙁

I found the culprit, in functions.php:

function maybe_list_children($content) {
	if (trim(strip_tags($content)) == '') {
		return '<ul class="children-list">' . wp_list_pages('child_of=' . get_the_ID() . '&echo=0&title_li=') . '</ul>';
	} else {
		return $content;
	}
}

function list_children_shorttag() {
	return maybe_list_children('');
}

add_filter('the_content','maybe_list_children');
add_shortcode('puslapiai', 'list_children_shorttag')

if I comment out add_filter call, it starts to work..

i’ve checked, both gallery, gallery subfolder, and thumbs folders are with 777 permission..