Problems with latex exporting in verbatim environment

[Stephen Eglen <S.J.Eglen@damtp.cam.ac.uk>]

Consider the following short example (code taken from Eric S's foo.org
file, which I'm working on):

----------------------------------------------------------------------
* Example 1

Using colon, the text is not reported verbatim.

: were $\beta_2$ = src_R{round(out3$coef[3], 4)}
: and $\beta_3$ = src_R{round(out3$coef[4], 4)}



* Example 2

Using example environment it seems to be exported fine in .tex

#+begin_example
were $\beta_2$ = src_R{round(out3$coef[3], 4)}
and $\beta_3$ = src_R{round(out3$coef[4], 4)}
#+end_example
 
----------------------------------------------------------------------
Example 1 is not exported okay, there are stray = and \texttt added;
whereas version two seems fine.  See snippet from tex file below.

This looks like a bug to me.  Are the two forms of verbatim really
equivalent?


Stephen


----------------------------------------------------------------------
relevant snippet from tex file, exported from above.

\section{Example 1}
\label{sec-1}


Using colon

\begin{verbatim}
 were $\beta_2$ = =src_R{round(out3$coef[3], 4)}=
 and $\beta_3$ = \texttt{src\_R\{round(out3\$coef[4], 4)\}}
\end{verbatim}
\section{Example 2}
\label{sec-2}


Using example environment


\begin{verbatim}
were $\beta_2$ = src_R{round(out3$coef[3], 4)}
and $\beta_3$ = src_R{round(out3$coef[4], 4)}
\end{verbatim}


Stephen