Hi,
Is there a reason why Beamer export does not place "\maketitle" in a frame?
The beamer user guide (I.3.4) specifies the following:
\begin{frame}
\titlepage
\end{frame}
But org-mode simply writes "\maketitle" outside of a frame.
This is important when you are using the same source to produce both a
beamer presentation and a beamerarticle print version. For the
presentation, you should use the ignorenonframetext class option, which
omits everything that is not between \begin{frame} and \end{frame}. Since
org doesn't write a frame for the title, then the title disappears.
Bug? I suspect so, as Beamer export is not following the format described
in the beamer manual.
See also
http://tex.stackexchange.com/questions/80277/beamer-with-ignorenonframetext-ignores-maketitle-command-too-why
hjh
