I'm trying a clean install with this in my init.el

(require 'package)
(add-to-list 'package-archives
  '("melpa-stable" . "http://melpa-stable.milkbox.net/packages/"))

(add-to-list 'package-archives
    '("org" . "http://orgmode.org/elpa/"))

;; Initialize all the ELPA packages (what is installed using the packages
commands)
(package-initialize)

(when (not package-archive-contents)
  (package-refresh-contents))


(defvar my-packages
  '(;; org mode
    org
    ;; org mode plus contrib
    org-plus-contrib))


(dolist (p my-packages)
  (when (not (package-installed-p p))
    (package-install p)))


eval-buffer-ing this gives

package-compute-transaction: Package ‘org-plus-contrib-’ is unavailable

It's as if it's looking for a specific org-plus-contrib-xxxx.tar ? Never
had this problem before.

LB