Occasionally, after getting on the horse, the controls do not respond properly. moving the mouse horizontally doesn't make much of a difference, forward and backward keys cause the horse to go in circles, strafe keys turn the horse around a fixed point in front of the horse (e.g. keeping either strafe key pressed causes the horse to go around this point in a circle).

The problem happens when the player mounts the horse when it is wandering about (walking animation). If the horse is standing still, it is safe to mount. If mounter when it is moving, getting off will allow it to resume its animation, and then it can be mounted again.