There appears to be a bit of an issue. I noticed it because my texture pack has asymmetric bow/crossbow textures. It seems that the bow is being held completely upside down and the crossbow has been mirrored in a similar manner, albeit horizontally. I would wager it is related to the animation/model glitches with this update. You can reproduce this by using any texture pack that has a bow texture that is not symmetrical along the usual diagonal \ .