Jeepers. If I had just followed through with the outcome of the thread we were *both* already on! - http://lists.gnu.org/archive/html/emacs-orgmode/2012-02/msg00131.html
Of course I find it only after having this drawn out troubleshooting exercise. I looked as I thought I could find a Worg page this might fit on... If it sounds good, I'll add a note for Windows users on ob-doc-R: - http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-R.html Sound good? I can point to both mailing list entries and note my need for a custom path due to 64bit setup and making sure to include the right arguments to the R command. John