I'm running emacs 25.0.50.1 (2014-12-10 nightly) with latest org-mode (now that git's working again) on Windows 7.
I have org-startup-folded set to nil (show everything). When I visit an org-mode file, I get an error in org-set-startup-visibility saying "void-function outline-show-all" and sure enough I have no such function. (This is lisp/org.el:6950.) This happens even with emacs -Q -L <my-org-mode-dir>. Any ideas? If it helps, the outline-mode.el I'm using is packaged with emacs, and has a "show-all" function but no "outline-show-all". -- Gary