Index: wp-includes/category-template.php
===================================================================
--- wp-includes/category-template.php	(revision 16333)
+++ wp-includes/category-template.php	(working copy)
@@ -1063,6 +1063,8 @@
 	if ( false === $terms )
 		$terms = wp_get_object_terms( $id, $taxonomy );
 
+	$terms = apply_filters( 'get_the_terms', $terms, $id, $taxonomy );
+
 	if ( empty( $terms ) )
 		return false;