[OS X TeX] Beamer / pgfpages question

[J. McKenzie Alexander]

Hello,

I've  configured beamer so that when I invoke it with the "handout" option it generates output with my slides configured in a 2x2 form and a border around them.  The code I have in the preamble to do this is the following: 

\mode<handout>{%
  \pgfpagesuselayout{4 on 1}[a4paper,landscape,border shrink=5mm]
  \pgfpageslogicalpageoptions{1}{border code=\pgfstroke}
  \pgfpageslogicalpageoptions{2}{border code=\pgfstroke}
  \pgfpageslogicalpageoptions{3}{border code=\pgfstroke}
  \pgfpageslogicalpageoptions{4}{border code=\pgfstroke}
}

The problem is that when the presentation contains a number of pages which is not a multiple of four, this particular setup causes a number of empty square "pages", with the frame drawn around them, to appear on the last page of the handout. I tried to fix this by clearing out some of the logical page options I've passed on to beamer as follows:

%
% The following frame is the last frame of the presentation,
% and it is the only frame appearing on the last page
% of the handout. Hence logical pages 2-4 should have 
% their border code cleared out so that no frame is drawn.
%
\clearpage
\pgfpageslogicalpageoptions{1}{border code=\pgfstroke}
\pgfpageslogicalpageoptions{2}{}
\pgfpageslogicalpageoptions{3}{}
\pgfpageslogicalpageoptions{4}{}

\begin{frame}[allowframebreaks]
  \frametitle{References and miscellaneous readings}
  \bibliographystyle{plainnat}
  \bibliography{/Volumes/iDisk/Documents/Bibliography.bib}
\end{frame}

That doesn't work, though. Any suggestions? This is a bit too low-level hacking for me to solve on my own...

Many thanks,

Jason

--
Dr J. McKenzie Alexander
Department of Philosophy, Logic and Scientific Method
London School of Economics and Political Science
Houghton Street, London WC2A 2AE




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