@Chounard it doesn't work right, when i set skeleton root bone rotation to 0.0 before i set a walk animation. it also walking at an odd angle.
here is my test code, it that right?

void ExampleLayer::test1(cocos2d::CCObject *obj)
{
    skeletonNode->rootBone->rotation = 0;
    skeletonNode->setToSetupPose();
    skeletonNode->setAnimation(0, "walk", true);
}

@Chounard Thanks, works great!