[AUCTeX] End of verbatim environment not detected

[José Carlos Santos]

Hi all:

If I open in Emacs+AucTeX a file whose contents are:

\documentclass{article}
\begin{document}
\begin{verbatim}
Some text
\end{verbatim}

Some more text.
\end{document}

then AucTeX "knows" where the verbatim environment ends. However, with
this file, that doesn't happen anymore:

\documentclass{article}
\begin{document}
{\small\begin{verbatim}
Some text
\end{verbatim}}

Some more text.
\end{document}

Is it a bug?

Best regards,

Jose Carlos Santos