[Orgmode] Bug: Column mode breaks beamer export [6.33trans]

[Robin Green]

After I enable "column view of properties" in the attached file, export
to PDF via LaTeX fails with the following error in the minibuffer:

org-export-as-latex: Text is read-only: "Type `e' to edit property"

Emacs  : GNU Emacs 23.1.50.1 (i486-pc-linux-gnu, GTK+ Version 2.18.0)
 of 2009-09-27 on palmer, modified by Debian
Package: Org-mode version 6.33trans

current state:
==============
(setq
 org-export-latex-after-initial-vars-hook '(org-beamer-after-initial-vars)
 org-agenda-files '("/src/greenrd/org")
 org-blocker-hook '(org-block-todo-from-checkboxes 
org-block-todo-from-children-or-siblings-or-parent)
 org-checklist-export-function 'org-export-as-ascii
 org-after-todo-state-change-hook '(org-clock-out-if-current org-checklist)
 org-agenda-todo-ignore-scheduled t
 org-startup-folded nil
 org-agenda-sorting-strategy '((agenda time-up priority-down effort-up 
category-keep)
                               (todo priority-down effort-up category-keep)
                               (tags priority-down effort-up category-keep) 
(search category-keep))
 org-agenda-prefix-format '((agenda . "  %-12:c%-12:T%?-12t% s") (timeline . "  
% s") (todo . "  %-12:c")
                            (tags . "  %-12:c") (search . "  %-12:c"))
 org-deadline-warning-days 900
 org-export-latex-format-toc-function 'org-export-latex-format-toc-default
 org-agenda-skip-scheduled-if-done t
 org-export-preprocess-hook '(org-export-blocks-preprocess)
 org-tab-first-hook '(org-hide-block-toggle-maybe)
 org-src-mode-hook '(org-src-mode-configure-edit-buffer)
 org-confirm-shell-link-function 'yes-or-no-p
 org-export-first-hook '(org-beamer-initialize-open-trackers)
 org-todo-keywords '((sequence "TODO(t)" "QUESTION(q)" "PLANNING(p)" 
"PENDING(e)" "STARTED(s)" "FINISHING(f)" "|"
                      "DONE(d)" "OBSOLETE(o)")
                     )
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-default-notes-file "/src/greenrd/org/remember.org"
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers 
org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook org-show-block-all 
append local] 5]
                 )
 org-global-properties '(("Effort_ALL" . "0 0:10 0:30 1:00 2:00 3:00 4:00 5:00 
6:00 7:00 8:00"))
 org-return-follows-link t
 org-confirm-elisp-link-function 'yes-or-no-p
 org-beamer-environments-extra '(("figure" "F" "\\begin{figure}" 
"\\end{figure}"))
 org-agenda-todo-ignore-with-date t
 org-enforce-todo-dependencies t
 org-occur-hook '(org-first-headline-recenter)
 org-priority-start-cycle-with-default nil
 org-export-preprocess-before-selecting-backend-code-hook 
'(org-beamer-select-beamer-code)
 org-agenda-todo-ignore-deadlines t
 org-modules '(org-bbdb org-bibtex org-gnus org-info org-jsinfo org-irc org-mew 
org-mhe org-rmail org-vm org-wl
               org-w3m org-checklist org-interactive-query org-man org-registry)
 org-remember-templates '(("Web link" 119 "* %u %c \n\n%:region\n" nil "Web 
links" nil))
 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-enforce-todo-checkbox-dependencies t
 org-lowest-priority 70
 )

#+STARTUP: beamer
#+TITLE: Cohere: Towards Web 2.0 Argumentation
#+AUTHOR: Simon Buckingham Shum
#+LaTeX_CLASS: beamer
#+LaTeX_CLASS_OPTIONS: [presentation]
#+BEAMER_FRAME_LEVEL: 2

#+BEAMER_HEADER_EXTRA: 
\usetheme{Szeged}\usecolortheme{wolverine}\institute{Knowledge Media Institute, 
The Open University, UK}
#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) 
%4BEAMER_col(Col) %8BEAMER_extra(Extra)
#+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC

* Context

** What is argumentation software? 

*** *mapping* an argument                                             :BMCOL:
:PROPERTIES:
:BEAMER_col: 0.5
:BEAMER_envargs: C[T]
:END:

**** exposing its structure

***** typically in graph form

*** for the purposes of this talk
# I was going to say "typically" here, but I've only read 4-5 papers
# in this area, so I can't be sure that it's typical. But that's how
# it seems to me.

**** *manual* data entry

***** not extraction

**** can relate back to sources

***** links

***** video timestamps

***                                                          :B_figure:BMCOL: 
:BMCOL:B_figure:
    :PROPERTIES:
    :BEAMER_col: 0.5
    :BEAMER_env: figure
    :END:
\includegraphics[width=.7\columnwidth]{What_the_Bible_says.jpg}

*** optionally

**** *queries* for sub-arguments

**** *multiple* I/O styles

***** directed graph

***** textual outline

**** *collaborative editing*

** Why use argumentation software?

*** example: climate change debates

*** large and complex

*** interdisciplinary

**** science

**** politics

**** economics

**** ethics

*** timely

**** Copenhagen conference

***** G77 delegates walk out

*** relevant to Cohere

**** ESSENCE project

** How might argumentation software help?

*** could make large, complex arguments

**** easier to navigate?

**** easier to search?

**** quicker to grasp?

***** or maybe /think/ you've grasped!

**** less repetitive

***** but Flat Earthers still exist

*** propagate updates in knowledge faster?

**** propagate lies and stupid ideas faster?

*** make debate more meritocratic?

**** "blogging will level the playing field" all over again?

** What does this sound like?

*** Wikipedia

**** similar advantages have been attributed to it

*** Is argumentation software reinventing the wheel?

**** inaccessibility of WP technical & scientific articles

**** different goals and value systems

***** WP: "Neutral Point of View" allows "he said / she said"

***** WP: Reliable Sources and Notability

***** WP: info not systematically structured along debate lines

* The paper

** Introduction

*** Motivation

****                                                            :B_quotation:
     :PROPERTIES:
     :BEAMER_env: quotation
     :END:
The context in which we find ourselves presents problems on a global scale 
which will
require negotiation and collaboration across national, cultural and intellectual
boundaries.

*** Differences from related work

**** distributed vs team-based

**** asynchronous vs real-time

**** introducing Web 2.0 principles

** Web 2.0 according to Buckingham Shum

*** Some have dismissed as marketing term

*** Four relevant elements

**** Simple but engaging multimedia UIs

***** Web UIs should stand on a par with desktop UIs

**** Emergent, not predefined, structure and semantics

***** let users define their own classification schemes

***** lightweight approaches (tags for blogs, social tagging) have good uptake

**** Social networks

***** status updates, friend recommendations, "reputation" indices

**** Data interop, mashups and embedding

** Cohere data model

***                                                                :B_figure:
    :PROPERTIES:
    :BEAMER_env: figure
    :END:
\includegraphics[width=.7\textwidth]{Cohere-data-model.png}

** Web 2.0-ish features

*** Emergent structure

**** Users can add own relation types

***** but seed data & autocompletion used to "nudge" users

*** Social

**** each idea links back to creating user

**** Future / in development

***** sitewide feeds (like Twitter's "everyone")

***** active user stats

***** notification when your idea is connected to someone else's

***** notification when your idea is embedded in another website

***** different views for when multiple people work on one idea (vague)

** Interop

*** XML-based feeds (RSS/Atom)

*** high level of addressability

**** almost everything has a unique URL

***** allows embedding using HTML iframes

*** import from Compendium offline argumentation tool

*** Future

**** export in a "variety of formats"