The reason was some code I borrows from the “Multi Page Toolkit“:

add_action('init', 'pb_allpage_permalink', -1);
function pb_allpage_permalink() {
	global $wp_rewrite;
	$wp_rewrite->add_endpoint("all", EP_ALL);
	$wp_rewrite->flush_rules();
}

This code enables pagebar to display all parts of a page which is splitted into multiple parts. As you might see the code adds a new rule to the permalink structure. Unfortunately it corrupted the permalinks in a way that custom taxonomies stopped to worked.

The solution to this problem was to fire the action much, much later and to to update the rules transient (soft flush):

add_action('init', 'pb_allpage_permalink', 99);
function pb_allpage_permalink() {
	global $wp_rewrite;
	$wp_rewrite->add_endpoint("all", EP_ALL);
	$wp_rewrite->flush_rules(false);
}

Hopefully this will solve the problems with custom taxonomies completely.

Download:

• pagebar258.zip

Download:

• pagebar v2.55 (ZIP)
• pagebar v2.55 (RAR)