Present in 4.1, 4.2 and 4.3.0b2
1 Create new project
2 Create Cube and Import Physic Materials (Assets->Import Package->Physic Materials)
3 Choose Cube in Hierarchy and Find field "Material" of Box Collider and click to circle to choose material
4 The window with materials should appear - see attached image
5 Select "None" and tap the "End" key on the keyboard - "Bouncy" will be selected, but should be "Wood"
6 Tap the "End" key on the keyboard again - "Rubber" will be selected
The same with "Page Down" key