Index: /Users/steph/Documents/code/WordPressSVN/trunk/wp-includes/taxonomy.php
===================================================================
--- /Users/steph/Documents/code/WordPressSVN/trunk/wp-includes/taxonomy.php	(revision 13734)
+++ /Users/steph/Documents/code/WordPressSVN/trunk/wp-includes/taxonomy.php	(working copy)
@@ -42,6 +42,7 @@
 														'query_var' => false,
 														'rewrite' => false,
 														'show_ui' => false,
+														'_builtin' => true,
 													) ) ;
 
 	register_taxonomy( 'link_category', 'link', array(	'hierarchical' => false,