This may be a python-mode bug but I'm new to all of this.

I observe the bug only when using org-mode together with python-mode. My
org-mode setup is supposed to load org-cdlatex-mode:

(autoload 'org-cdlatex-mode "cdlatex" "Enter org-cdlatex mode" t)
(add-hook 'org-mode-hook 'turn-on-org-cdlatex)

and this works fine when python-mode is not loaded. When I load python
mode, however (trunk version)

  (setq py-install-directory "~/.emacs.d/python-mode.el-6.1.0")
  (add-to-list 'load-path py-install-directory)
  (require 'python-mode)

Then cdlatex mode is not loaded anymore and it's impossible to unfold
any headlines. Org-mode becomes entirely useless:

#+TODO: TODO CODE(c) DOCU(d) PLAN(p) PROJ(j) QUESTION(q) TEST(t) |
DONE(d) ANSWERED(a)
#+TAGS: PHONE(p) URGENT(u) MAIL(m)  CODE(c)
#+STARTUP: inlineimage
#+AUTHOR: anauthor
#+TITLE: a title
...

when I try to expand the '...' (which btw looks lice '* Introduction...'
when everything works fine), I get the message "outline-end-of-heading:
Wrong type argument: stringp, nil"

What to I do?


Emacs  : GNU Emacs 23.4.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.12)
 of 2012-09-22 on allspice, modified by Debian
Package: Org-mode version 7.8.11

current state:
==============
(setq
 org-ditaa-jar-path "/usr/bin/ditaa"
 org-export-latex-after-initial-vars-hook '(org-beamer-after-initial-vars)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-startup-truncated nil
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-export-latex-format-toc-function 'org-export-latex-format-toc-default
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-src-native-tab-command-maybe
                      org-babel-hide-result-toggle-maybe)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-confirm-shell-link-function 'yes-or-no-p
 outline-heading-end-regexp nil
 org-export-first-hook '(org-beamer-initialize-open-trackers)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
                  org-cycle-show-empty-lines
org-optimize-window-after-visibility-change)
 org-export-preprocess-before-normalizing-links-hook
'(org-remove-file-link-modifiers)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook
org-show-block-all append local] 5]
                 #[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook
org-babel-show-result-all append local]
                   5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes
turn-on-org-cdlatex)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
org-babel-execute-safely-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-export-interblocks '((src org-babel-exp-non-block-elements))
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-occur-hook '(org-first-headline-recenter)
 org-export-preprocess-before-selecting-backend-code-hook
'(org-beamer-select-beamer-code)
 org-export-latex-final-hook '(org-beamer-amend-header org-beamer-fix-toc
                               org-beamer-auto-fragile-frames
                               org-beamer-place-default-actions-for-lists)
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-export-blocks '((src org-babel-exp-src-block nil)
                     (export-comment org-export-blocks-format-comment t)
                     (ditaa org-export-blocks-format-ditaa nil)
                     (dot org-export-blocks-format-dot nil))
 )