Why can't I flip key frames? When animating, I realised not all the key frames get flipped! After selecting a column of keyframes in the dopesheet, I press Ctrl+C to copy them, then Shift+Ctrl+V to paste/flip them, but only one keyframe is flipped and the others are not. Why?
Select the keyframes in the dope sheet editor, than - Shift+M (in the menu: Key - Mirror)