revtex capitalizes section titles

[nschloe]

trafficstars

\documentclass{revtex4}
% \documentclass{article}

\begin{document}

\section{iNtRoDuCtIoN}

\end{document}

LaTeX output:

LaTeXML output:

<title><tag close=" ">I</tag>iNtRoDuCtIoN</title>