I believe I've figured it out.  I must have an old version of 'htmlize'
installed somewhere, I 'edebug' traced through the code and fell through to
this part:

      (when lang
(if (featurep 'xemacs)
    (require 'htmlize)
  (require 'htmlize nil t))
(when (not (fboundp 'htmlize-region-for-paste))
  ;; we do not have htmlize.el, or an old version of it
  (setq lang nil)
  (message
   "htmlize.el 1.34 or later is needed for source code formatting")))

I couldn't manage to set up my load-path to load htmlize 'properly' (is
htmlize not able to be loaded via 'load-path' and 'require'?), but after
downloading htmlize 1.43 and adding the following to my .emacs, I seem to
be in business again:

    (load-file "~/share/emacs/site-lisp/htmlize/htmlize.el")

Thanks everyone.



On Mon, Jan 21, 2013 at 1:39 AM, Eric S Fraga <e.fraga@ucl.ac.uk> wrote:

> Ken Williams <kenahoo@gmail.com> writes:
>
> > Thanks John.  Here's a small org file:
>
> Data point: this works just fine for me with both old and new
> exporters.  And I don't even have R installed on this particular system
> (hadn't realised until now ;-).
>
> --
> : Eric S Fraga, GnuPG: 0xC89193D8FFFCF67D
> : in Emacs 24.3.50.1 and Org release_7.9.3d-826-gbe0d87
>
>