Index: wp-includes/taxonomy.php
===================================================================
--- wp-includes/taxonomy.php	(revision 19820)
+++ wp-includes/taxonomy.php	(working copy)
@@ -1867,6 +1867,9 @@
 function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
 	global $wpdb;
 
+	if ( empty( $object_ids ) || empty( $taxonomies ) )
+		return array();
+
 	if ( !is_array($taxonomies) )
 		$taxonomies = array($taxonomies);