I can't delete rigid body cache from scene. When I delete old objects and add new ones they are acting like the old objects. I tried all options under rigid body cache panel in scene properties, Free bake, Bake All Dynamics and others but none of them is working. I wonder how can I delete old rigid body cache from scene?
Under the menu: Scene selection > Rigid Body World > Rigid Body Cache > Free All Bakes > Reset Start and End > Bake
This worked for me in 2.74. It took less than a minute to bake 325 frames.