An extra puzzle has been added in the room that leads to the top of the waterfall garden in the PAL version of the game. Whereas before you could shimmy around the room on bars, now you can only reach a switch. Pull this to start a giant wooden piston in the room. To get to the window, stand on the piston and press Jump just as it begins to sink to the lowest point. You should be catapulted up to a ledge. Just climb up to the window.