Windows 8, 64bits. Nvidia gtx 460 se

2.72 eb464ee

In blender Cycles engine, Material Viewport, Blender not update the color animation or any other animations made in Nodes material.
After press Alt+A and stop animation the color is not changing at all.
But would be very helpful if the color is updating during animations. Is very hard to make animations colors without to see in real time.
Thank you.

I put a blend file.

In Cycles engine, Create new material and over color press right click and "Insert Keyframe" then go other frame and chose other color and "Insert Keyframe". Then play animation with Alt+A and the colors not update during the animation