problem with Beamer and pgfpages package since updating

[graffiacane]

Hi,
I have trouble running MiKTeX since I updated packages. More specifically, there seems to be a conflict between the beamer class and the pgfpages package. If I run a test file (see code below) without loading the pgfpackage, it runs fine, but as soon as I uncomment the line which loads the pgfpages package, pdflatex complains of an undefined control sequence (see attached log file).

the test.tex file is the following:

\documentclass{beamer}
%\usepackage{pgfpages}

\begin{document}
\title{test title}
\subtitle{test subtitle}
\author{Author Author}
\mbox{}\vspace{-3em}\date{\today}

\begin{frame}
\titlepage
\end{frame}

\begin{frame}{test first frame}

Some random text.
Some random text.
Some random text.
Some random text.
Some random text.

\end{frame}
\end{document}

test.log.txt

Can anyone reproduce this? I can't see where I am doing something wrong.
Thanks for any help.

Giovanni