I created an action in which i am creating a selective color adjustment layer. In this adjustment i'm adding 30%C, 30%Y and 30%M to Black. This adjustment is set to absolute. After using this action on other files adjustment in selective color layer is set to relative.
Yes that seems to be a bug in CS6 action recorder for CS5 recorder records the set current adjustment layer with the option "Method: absolute" in the step.
The CS6 Action recorder omits recording this so when the action is played the default method relative is used.