How do I fix baseline alignment of bullet-items in beamerposter?

In beamerposter, 2008/03/11. v.1.07. (the version in Tex Live 2011), itemize bullets are misaligned:

\documentclass[final]{beamer}
\usepackage[english]{babel}
\usepackage[orientation=portrait,size=a4,scale=1.0,debug]{beamerposter}  % e.g. custom size poster
\begin{document}
\begin{frame}{}
\begin{block}{\Large{Summary}}
\begin{itemize}
\item Item 1
\item Item 2
\item Item 3
\end{itemize}
\end{block}
\end{frame}
\end{document}

• How can I fix the vertical alignment?
-
Remember that \Large is not a command receiving arguments: \begin{block}{{\Large Summary}} would be the "correct" way, but since the title is probably typeset in a box of its own, \begin{block}{\Large Summary} should suffice. –  egreg Jun 12 '12 at 10:01
Right, thanks. This was a copy-paste from years old code :) –  gerrit Jun 12 '12 at 12:24
I made a note because that syntax might bite you, some day. Good to know that you know. :) –  egreg Jun 12 '12 at 12:49

\setbeamertemplate{itemize item}{\raisebox{0.1ex}{$\blacktriangleright$}\hskip0.1em}