Ticket #23668: emptytax.diff

wp-includes/taxonomy.php

@@ -343 +343 @@
         }
 
         if ( false !== $args['rewrite'] && ( is_admin() || '' != get_option('permalink_structure') ) ) {
+               if ( empty( $args['rewrite']['slug'] ) )
+                   $args['rewrite']['slug'] = $taxonomy;
                 $args['rewrite'] = wp_parse_args($args['rewrite'], array(
                         'slug' => sanitize_title_with_dashes($taxonomy),
                         'with_front' => true,