Input Switch For Leopard

In Leopard 10.5 my option for International support that stays for "Allow a different input source for each document" no longer exists.

Why, Apple, why?! Steve, along with 3D dock you gave me that I pimp myself, what's wrong with multi-language support on each window separately and why I have to switch between four keyboard layouts all the time?..

Here is a cure: http://limechat.net/inputswitcher/