Index: wp-admin/edit-form-advanced.php
===================================================================
--- wp-admin/edit-form-advanced.php	(revision 18664)
+++ wp-admin/edit-form-advanced.php	(working copy)
@@ -108,7 +108,7 @@
 // all taxonomies
 foreach ( get_object_taxonomies($post_type) as $tax_name ) {
 	$taxonomy = get_taxonomy($tax_name);
-	if ( ! $taxonomy->show_ui )
+	if ( ! apply_filters('post_edit_tax_meta_box', $taxonomy->show_ui, $taxonomy, $post_type) )
 		continue;
 
 	$label = $taxonomy->labels->name;