there are only two things I can spot that are off! two! TWO!!!!! one, she should have three fnigers on the string, not two. and also, her thumb should be down. her legs are a bit wide, but they're way better than a lot of other ones I've seen.
it's actually pretty bad form for an archer, but it's WAAAAAY better than others I've seen. others put their legs a yard apart and the bow tilted or something. :I (I do archery, thus the irratation at being unabele to find stock with a good posture)