Hand bends backwards when you crouch. Don't know if bug or intentional.
Linked issues
Comments 2
Duplicate of MC-47431 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.
Is this still a concern in the latest Minecraft version 14w06b? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.