--- mantisbt-1.2.3-orig/core/history_api.php	2010-09-14 20:40:10.000000000 +0200
+++ mantisbt-1.2.3/core/history_api.php	2010-10-22 08:37:52.000000000 +0200
@@ -390,6 +390,7 @@
 					$p_old_value = string_custom_field_value_for_email( $p_old_value, $t_cf_type );
 				}
 				$p_new_value = string_custom_field_value_for_email( $p_new_value, $t_cf_type );
+				$t_field_localized = lang_get_defaulted( $p_field_name);
 			}
 		}