Good news: avatars can now be 100x100 pixels!
Bad news: it scales up smaller avatars automagically.
Worse news: that makes the CIT avatars distort and look bad.
"Could be good, could be REALLY BAD" news: images are currently enabled! There is no way to distinguish between wanting to see images in posts and wanting to see images in sigs, so it's either all or none. For now, I'm liberally using adblock on a large number of signature images.