I've had a Jobo Tetenol C-41 Press Kit, 1 liter, powdered, that is many years old. I am not sure when I bought it, but probably back in 2003 or so. When I opened the developer packet, I noticed a lot of brown flecks in the powder. When I mixed it with 800ml water as directed, it turned out a somewhat turbid dark amber, almost brown color. I'm guessing the developer is spoiled, oxidized, even though it was in a sealed foil pouch. Surely the developer shouldn't be brown. But I've never used one of these press kits before, so I figured I'd ask. Can anyone confirm?