Wow. Totally creepy, and it isn't one of those things that's even difficult to see and completely bizarre, it's quite clear. Still, given the talent for imagery that Quitely has, I'm not too surprised.
And count me as one of the few that didn't like the Killing Joke's recolouring at all, and will most definitely be rebuying his old paperback edition when DC publish it again. I didn't like the bringing focus onto particular things, like the shellfish and the Red Hood helment - I thought the demented, delirious yellows were absolutely perfect for the undeniably surreal mindscape of the Joker, whereas the recolouring grounds it horribly in realism and takes away from the idea that he might be lying, or he might be telling the truth.