Index: wp-includes/taxonomy.php
===================================================================
--- wp-includes/taxonomy.php	(revision 23495)
+++ wp-includes/taxonomy.php	(working copy)
@@ -1330,9 +1330,11 @@
 	$exclusions = apply_filters('list_terms_exclusions', $exclusions, $args );
 	$where .= $exclusions;
 
-	if ( !empty($slug) ) {
-		$slug = sanitize_title($slug);
-		$where .= " AND t.slug = '$slug'";
+	if ( ! empty( $slug ) ) {
+		if ( ! is_array( $slug ) )
+			$slug = array( $slug );
+		$slug = array_map( 'sanitize_title', $slug );
+		$where .= " AND t.slug IN ('" . implode( "', '", $slug ) . "')";
 	}
 
 	if ( !empty($name__like) ) {