[XeTeX] Ubuntu Dapper A4 vs letter problem

[Akira Kakuto]

> \documentclass[letterpaper]{article}
> \begin{document}
> Some text.
> \end{document}

\documentclass[letterpaper]{article}
\special{papersize=8.5in,11in}
\begin{document}
Some text.
\end{document}

Best regards,
Akira