RotationX/RotationY in new Cocos2dx

Hi,
i updated my cocos2dx from version 2.0.4 to 2.1.4 and saw that there are some now rotation function which are used by CCRotateTo-Action. What does rotation x and y exactly mean and why are is the old set/getRotation function was not removed? This leads to some problems if you have overloaded the old get/setRotation functions for your own nodes. With the new code the rotation action do not work, but your code compiles.