You don't need this patch if you bought the game after November 28 2009.
level Waste Dump: fixed logo over game and possibly frozen game while interaction with the rat.
level Furnace Room: interaction with right-side controller is now possible only when really standing near by.
level Alley: fixed possible lost of barrel while stopping game during animation of pulling the barrel from the bar.
level Sewer Room: fixed one incorrect state of water pipes.
level Bar: it’s easier now to beat the “bar bot” in 5-in-a-row game after several looses.