Bug: Nesting of columns and itemized lists is reversed [7.5]

[Davor Cubranic <cubranic@stat.ubc.ca>]

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In a Beamer presentation, if I nest multiple columns within a list item,
the enclosing 'itemize' environment gets closed before the 'columns'
environment that it contains. See attached .org and the generated .tex

I'm running GNU Emacs 23 from MacPorts, with Org-mode 7.5 installed from
source I downloaded from the Orgmode website.

Davor Cubranic

------------------------------------------------------------------------



Emacs  : GNU Emacs 23.3.1 (x86_64-apple-darwin10.7.0, GTK+ Version 2.24.3)
of 2011-04-04 on toque.stat.ubc.ca
Package: Org-mode version 7.5

current state:
==============
(setq
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-after-todo-state-change-hook '(org-clock-out-if-current)
org-export-blocks-postblock-hook '(org-exp-res/src-name-cleanup)
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
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)
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 '((lob org-babel-exp-lob-one-liners) (src org-babel-exp-inline-src-blocks))
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) (comment org-export-blocks-format-comment t)
                     (ditaa org-export-blocks-format-ditaa nil)
                     (dot org-export-blocks-format-dot nil))
)

[-- Attachment #2: beamer-bug.org --]
[-- Type: application/octet-stream, Size: 1218 bytes --]

#+TITLE:     Foobar
#+AUTHOR:    Davor Cubranic
#+EMAIL:     stat.ubc.ca
#+DATE:      2011-05-10 Tue
#+DESCRIPTION:
#+KEYWORDS:
#+LANGUAGE:  en
#+OPTIONS:   H:3 num:t toc:t \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
#+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
#+INFOJS_OPT: view:nil toc:nil ltoc:t mouse:underline buttons:0 path:http://orgmode.org/org-info.js
#+EXPORT_SELECT_TAGS: export
#+EXPORT_EXCLUDE_TAGS: noexport
#+LINK_UP:   
#+LINK_HOME: 
#+XSLT:
#+LaTeX_CLASS: beamer
#+LaTeX_CLASS_OPTIONS: [presentation]
#+BEAMER_FRAME_LEVEL: 2

#+BEAMER_HEADER_EXTRA: \usetheme{default}\usecolortheme{default}
#+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

* Foobar

** Foo vs Bar
*** bar baz
**** Foo                                                        :BMCOL:B_block:
     :PROPERTIES:
     :BEAMER_col: .5
     :BEAMER_env: block
     :END:
     : foo := foo + 1
     : foo
**** Bar                                                    :BMCOL:B_block:
     :PROPERTIES:
     :BEAMER_col: .5
     :BEAMER_env: block
     :END:
     : bar := bar + 1
     : bar


[-- Attachment #3: beamer-bug.tex --]
[-- Type: application/octet-stream, Size: 1205 bytes --]

% Created 2011-05-10 Tue 14:53
\documentclass[presentation]{beamer}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fixltx2e}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{soul}
\usepackage{textcomp}
\usepackage{marvosym}
\usepackage{wasysym}
\usepackage{latexsym}
\usepackage{amssymb}
\usepackage{hyperref}
\tolerance=1000
\providecommand{\alert}[1]{\textbf{#1}}

\title{Foobar}
\author{Davor Cubranic}
\date{2011-05-10 Tue}

\usetheme{default}\usecolortheme{default}
\begin{document}

\maketitle

\begin{frame}
\frametitle{Outline}
\setcounter{tocdepth}{3}
\tableofcontents
\end{frame}


\section{Foobar}
\label{sec-1}
\begin{frame}[fragile]
\frametitle{Foo vs Bar}
\label{sec-1_1}
\begin{itemize}

\item bar baz
\label{sec-1_1_1}%
\begin{columns}
\begin{column}{.5\textwidth}
\begin{block}{Foo}
\label{sec-1_1_1_1}

\begin{verbatim}
      foo := foo + 1
      foo
\end{verbatim}
\end{block}
\end{column}
\begin{column}{.5\textwidth}
\begin{block}{Bar}
\label{sec-1_1_1_2}

\begin{verbatim}
      bar := bar + 1
      bar
\end{verbatim}
\end{block}
\end{itemize} % ends low level
\end{column}
\end{columns}
\end{frame}

\end{document}