Hi all!
Could you please try another thing (with the git version where this bug
occurs):
1. Create a file test.el with these contents:
--8<---------------cut here---------------start------------->8---
(add-to-list 'load-path "~/path/to/org-mode/lisp/") ;; EDIT TO YOUR NEEDS
(setq org-modules nil)
(require 'org-install)
(add-to-list 'auto-mode-alist '("\\.org$" . org-mode))
(require 'org-gnus)
--8<---------------cut here---------------end--------------->8---
2. Start emacs like this:
$ emacs -Q -l ~/path/to/test.el
3. Open some org file and check if the problem still occurs.
If that works for you, I think that there's something wrong with the
org-modules loading. See also Carsten's forwarded message
<address@hidden>.