Nick,
I have pasted the tex file below. Thanks for your help.
Buck
% Created 2010-04-23 Fri 12:11
\documentclass[presentation]{beamer}
\usetheme{Madrid}\usecolortheme{default}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{soul}
\usepackage{amssymb}
\usepackage{hyperref}
\title{Example Presentation}
\author{Carsten Dominik}
\date{23 April 2010}
\begin{document}
\maketitle
\begin{frame}
\frametitle{Outline}
\setcounter{tocdepth}{3}
\tableofcontents
\end{frame}
\section{This is the first structural section}
\label{sec-1}
\begin{frame}
\frametitle{Frame 1}
\framesubtitle{with a subtitle}
\label{sec-1.1}
\begin{columns}[t]
\begin{column}{0.5\textwidth}
\begin{block}{Thanks to Eric Fraga}
\label{sec-1.1.1}
for the first viable beamer setup in Org
\end{block}
\end{column}
\begin{column}{0.5\textwidth}
\begin{block}<2->{Thanks to everyone else}
\label{sec-1.1.2}
for contributing to the discussion
\end{block}
\end{column}
\end{columns}
\end{frame}
\begin{frame}
\frametitle{Frame 2}
\framesubtitle{Like 1, but now with explicit columns}
\transblindsvertical[duration=1]
\label{sec-1.2}
\begin{columns} % columns
\label{sec-1.2.1}
\begin{column}{0.5\textwidth}
\label{sec-1.2.1.1}
\begin{block}{Thanks to Eric Fraga}
\label{sec-1.2.1.1.1}
for the first viable beamer setup in Org
\end{block}
\end{column}
\begin{column}{0.5\textwidth}
\label{sec-1.2.1.2}
\begin{block}<2->{Thanks to everyone else}
\label{sec-1.2.1.2.1}
for contributing to the discussion
\end{block}
\end{column}
\end{columns}
\end{frame}
\begin{frame}
\frametitle{Frame 2}
\framesubtitle{where we will not use columns}
\label{sec-1.3}
\begin{itemize}
\item Request\\
\label{sec-1.3.1}%
Please test this stuff!
\end{itemize} % ends low level
\end{frame}
\end{document}