I'm using emacs 24.2.1 in Ubuntu 13.04.

In the supplied org-mode version 7.8.11, I cannot export. When I attempt to
export (c-e c-a) I get: "Can't find library org".

If I use the package installer to upgrade org I get version 8.0.4 but it
then fails to complete my initialisation with: "Symbol's function
definition is void: org-defvaralias"

This is the backtrace:
Debugger entered--Lisp error: (void-function org-defvaralias)
  org-defvaralias(org-agenda-filter-preset org-agenda-tag-filter-preset)
  byte-code("\300\301\302\"\210\300\303\304\"\207" [org-defvaralias
org-agenda-filter-preset org-agenda-tag-filter-preset org-agenda-filter
org-agenda-tag-filter] 3)
  (org-agenda-list)
  (lambda nil (if (y-or-n-p-with-timeout "Update notes?" 7 t) (progn
(message "Updating ~/notes...") (shell-command-to-string "svn update
~/notes"))) (org-agenda-list) (switch-to-buffer (get-buffer "*Org
Agenda*")))()
  run-hooks(after-init-hook)
  command-line()
  normal-top-level()

If I try to export in 8.0.4 I get the "Symbol's function definition is
void: org-defvaralias" error again.

I don't really mind if I use 7.8.11 or 8.0.4 but I need it to load my
org-files without breaking and I need to be able to export them (usually as
html but pdf is great too on occasion).

Does anyone have a workaround or fix for this?