Spark's Sprites

[GFA]

I'd say No Face looks quite a bit better in the whole contrast department and the same goes for Kiki's balance issues. Her CSS sprite is still a tad wonky though. Her cheek buldges a little too much. Here's a little list of somethings I think might help:

1: Smooth her chin.
2: Center her mouth.
3: Lower her nose.

I also think you should center No Face's CSS sprite a little more. It would give it a more uniform feel in comparison to the rest.