[XeTeX] Typesetting XeLaTeX and LaTeX logo under MacTeX 2009

[Iwan Setyawan]

Hi,

First, my apologies if this has been brought up before.

I'm having some difficulties typesetting the "XeLaTeX" and "LaTeX"  
logo under MacTeX 2009 and Xe(La)TeX.
The problem is that  the "A" in LaTeX is typeset in lowercase, instead  
of uppercase. I don't have problem
typesetting the LaTeX logo if I use LaTeX, instead of XeLaTeX.

Here's an example of my code:

\documentclass[xetex,mathserif,serif]{beamer}
\usepackage{graphicx}
\usepackage{enumerate}
\usepackage{amsmath,amssymb,mathrsfs}
\usetheme{Hannover}
\usecolortheme{crane}
\usepackage[no-math]{fontspec}
\usepackage{xunicode}
\usepackage{xltxtra}
\setmainfont[Scale=1,Mapping=tex-text]{Optima}

\mode<presentation>


\begin{document}
\begin{frame}{Testing}
	Testing Beamer and \XeLaTeX\ combination. Here's a simple
	equation:
	\begin{equation}
		c^{2}=b^{2}+a^{2}
	\end{equation}
	Isn't this \textbf{cool}? Now I can make presentations that
	take full advantage of the available fonts on my Mac!
	Here's another equation:
	\begin{equation}
		\alpha=\int_{\gamma}^{\psi} f(\zeta)d\zeta
	\end{equation}
\end{frame}
\end{document}

The following was the result when I was still using MacTeX 2008:
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The following was the result I have now. I'm using MacTeX 2009:
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I get the same results with both TeXShop and Aquamacs. My MacTeX 2009  
installation is "virgin", that is, I don't recall updating any
of the packages. I am using Mac OS X 10.5.8, on an iBook G4. The first  
example (the one typeset using MacTeX 2008) was typeset
when this laptop was still running Tiger (10.4.x, forgot the exact  
version, but I think it was the most recent). I found it lying around  
in a
backup folder.

Any help will be greatly appreciated.

- Iwan