Mauro Aranda <maurooaranda@gmail.com> writes:

> After emacs -Q:
> 1. (require 'org)
> 2. M-x customize-face RET org-property-value
>
> A custom buffer shows up, but it says:
> NO CUSTOMIZATION DATA; not intended to be customized.

Thanks for reporting!

I am attaching tentative patch that makes `org-property-value' face
inherit from default face. This will preserve the existing look as Emacs
falls back to default face for "nil" faces.

Or do we want to change this face to inherit from something like
font-lock-string-face?