First cycles project - my floor texture previews but does not render

Greetings folks, I use Blender 2.70a for modeling for 3d printing quite a bit but this is my first project where I’m attempting to use the excellent Cycles renderer for a little logo sequence.

It previews beautifully but my ground texture does not render.
It previews like this:

but renders like this:

my floor material node configuration

Any ideas what’s not right?

Check your render layers are correct
Check you have set the floor to be renderable (camera icon in outliner window)
Check you haven’t set any duplication in the Object / Duplication settings

Supply a link to your .blend file for review