Can you guys animate the renderer's param in 4.3?

I'm trying to animate the renderer's param with animation, like the color of the material. It works well in 4.2, but after a upgrade the unity3D to 4.3, it can't work anymore.

I can animate the transform, position or else.

When I try to animate a color param of my material, the param in the inspector became red, I don't know what's that means.It seems like everything work correctly by the curves, but the color never changed.

Is that a bug of 4.3?