I suggest dropping the highlights for this one :0 it looks too much like actual highlights, if ya know what I mean.
That being said, I love the hair color and the way you formed the bangs and everything - you've improved a lot! :33 The only complaint I have is that it looks like you've got a wee bit of pillow shading going on in the front bang.
Lul, I went back and added the highlights after I remembered "SHINY HAIR".
Still a bit confused about the banding though. I can see the difference, but I'm confused by what it is (aside from hugging pixels) and what causes it.
xDD Maybe yellow is just a bit too saturated for it.
I was confused at first as well D: It's like if you have two rows (or columns) of pixels that always 'jump' the same amount, at the same place. It looks bad because it decreases the apparent resolution and makes it blurry.