So, I'm working on this sketch, and the ribcage is bugging me. I'm usually pretty good with anatomy,. but have fallen out of practice and a lot of what I knew escapes me.

Can I get a redline?

Drat it all, I want to help, but you've got a better sense than I do. I feel there's something subtly wrong, but I cant say chat. Nor redline. something about the arms. I'll come back later.

hmmm the arms seem a little off but the chest looks ok to me, but I'm not the greatest so not sure if I really have room to talk =X

Perhaps... the angle of the head to the curve of the neck is inconsistant?

The neck seems to be a little offplace and broaden the right shoulder just a teensie bit.

Alright, so it's agreed it's in the neck and perhaps shoulder...
The question is just what. that. is...
I'm going to attempt a redline for ye.

Edit:

Alright, I don't know how helpful it is. But I did my level best to try and figure it out. Blah, I'm not practiced enough below the ribs.

I have a some what similar reference image, if it helps any ^^;;
http://www.posemaniacs.com/?p=635

er, atleast it might help of the legs since drawing the legs open is kind of hard o_o

Dude! That is one amazing site!
Thanks for putting that up. <3