Hi,
The "Scale Time" action has it's adjustFixedDeltaTime property not implement, so the action attached to this thread will correc this. if you set adjustFixedDeltaTime to false, it will properly leave FixedDeltaTime alone.
THIS IS CRITICAL if you want to pause physics based games, if FixedDeltaTime is changed, resuming to normal time scale will have your physics appears to "jump" and settle down again. If you experience this, this is the likely reason.
bye,
Jean