[O] [latex, beamerposter] Muticolumn poster with multicolumn blocks or BMCOL and B_columns coexistance, is it possible?

[Mikhail Titov]

All:

I realized I have a need for 2 columns in a block. However when I tried to use 
B_columns and B_column besides BMCOL that were alreasy in there, it failed to 
generate proper LaTeX source. Below is the trimmed down example that fails to 
work properly on 7.8.09 . Do I miss something?

#-*- buffer-file-coding-system: utf-8; TeX-master: t -*-
#+Title: Test for multicolumn blocks in multicolumn poster
#+LaTeX_CLASS: beamer
#LaTeX_CLASS_OPTIONS: [presentation]
#+BEAMER_FRAME_LEVEL: 1
#+STARTUP: beamer

#BEAMER_HEADER_EXTRA: \usetheme{I6dv} %mlt}
#\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
#+OPTIONS: toc:nil

#+latex_header: 
\usepackage[orientation=landscape,size=custom,width=182.88,height=101.6,scale=1.5]{beamerposter}

#+LATEX_HEADER: \renewcommand\maketitle{}
# http://blog.zindel.org/?p=99
#+latex_header: \def\newblock{\hskip .11em plus .33em minus .07em}


# C-c C-x C-c for column view
* Poster

** Left                                               :BMCOL:B_ignoreheading:
   :PROPERTIES:
   :BEAMER_col: 0.32
   :BEAMER_env: ignoreheading
   :END:

*** 1 Left                                                  :B_block:
    :PROPERTIES:
    :BEAMER_env: block
    :END:

**** Columns                                                      :B_columns:
     :PROPERTIES:
     :BEAMER_env: columns
     :END:
***** .5                                                           :B_column:
      :PROPERTIES:
      :BEAMER_env: column
      :END:
- intro left. Comment stuff above till including Columns to make it compilable
***** .4                                                           :B_column:
      :PROPERTIES:
      :BEAMER_env: column
      :END:
- intro right. Comment stuff above.

** Center                                             :BMCOL:B_ignoreheading:
   :PROPERTIES:
   :BEAMER_col: 0.32
   :BEAMER_env: ignoreheading
   :END:

*** 2 Center                                                        :B_block:
    :PROPERTIES:
    :BEAMER_env: block
    :END:

- Central block

** Right                                              :BMCOL:B_ignoreheading:
   :PROPERTIES:
   :BEAMER_col: 0.32
   :BEAMER_env: ignoreheading
   :END:

*** 3 right block                                           :B_block:
    :PROPERTIES:
    :BEAMER_env: block
    :END:

- hello

Mikhail