Sin() and Clamp0-1() producing black

Do you mean in the shader or in the node previews?

Oh yes sorry: the quad preview mesh, 50% gray background, dx9.

Do you have them in this order?

Clamp0-1 <- Sin <- Time

Hm I've just noticed this error in the console:

D3D shader assembly failed with: (11): error X6061: _sat not permitted with SINCOS instruction.

Oh, yikes, that sounds scary. Seems more like an error in Unity's translation from CG to assembly

A dirty fix is this:
Clamp0-1 <- Add(0.0001) <- Sin <- Time

Strange really, I can't see why you would get that error.

Anyhow, you probably don't want to use clamp0-1 right after sin, that will give you a bump, followed by a flat line, then another bump, etc.

If you want a sine from 0 to 1, use the remap node instead, and remap from -1, 1 to 0, 1

More info: http://acegikmo.com/shaderforge/wiki/index.php?title=Waveforms

I wanted the bumps. :) The wiki is great!

I see! Strange anyhow...