ok, so i'm trying to get my head around render layers. I have a scene set up with a fly sitting on a leaf - the leaf has been imported into the scene and has a sss fast simple shader attached.

the problem is that when i render the diffuse layer, the leaf still renders with it's specular highlights, while the fly renders flat - as it should. is there something i'm missing? i thought it might be the sss shader, but when i render the occlusion layer it seems to work fine.

help!