I noticed while looking at my books that there are a few places where they still use the old item saving throw classification system. In the player's manual, disintegrate on pg. 193 still mentions a Class 5 saving throw. In the Referee's Manual the lesser daemons class viii and ix on pg. 52 mentions Class 2 and Class 5 respectively, while the section on flaming pitch on pg. 294 mentions a Class 10 save.