Everything is set up different on the physics tab in 2.6 and I can’t figure it out like it doesn’t have the rigid body thing and the options like before and I can’t get things to fall in playback mode like with the gravity and whatnot. this is really bugging me… I hate it that whenever we get used to something they go and change it on us!
At the top of the blender window change from ‘Blender Render’ to ‘Blender Game’. The physics panel will now have all the rigid body settings you are looking for.