That is pretty weird. It should be defined in org-faces.el. What org version are you using?

John

-----------------------------------
Professor John Kitchin 
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803

On Tue, Jan 12, 2016 at 6:53 AM, Karl Voit <devnull@karl-voit.at> wrote:
* John Kitchin <jkitchin@andrew.cmu.edu> wrote:
> I halso have no org-block-background in my setup: C-h v org-block-<TAB>!
>
> Are faces supposed to show as variable?

I have no clue. Unfortunately, my elisp knowledge is very small.

> in my setup, this is defined in org-faces.
>
> Maybe you can do something as mundane as
> (set-face-background 'org-block-background "plum2")
> in your init file.

This results in: "set-face-attribute: Invalid face:
org-block-background"

--
mail|git|SVN|photos|postings|SMS|phonecalls|RSS|CSV|XML to Org-mode:
       > get Memacs from https://github.com/novoid/Memacs <

https://github.com/novoid/extract_pdf_annotations_to_orgmode + more on github