If an org file contains a latex equation with a '&' in it then when it is
exported to odt it makes dodgy xml. Unzipping the odt, opening the
content.xml and doing M-x rng-first-error gives the message:
`&' that is not markup must be entered as `&'
To reproduce, insert this:
\begin{equation}
\delta_{mn} =
\begin{cases}
1& \text{if $n=m$}\\
0& \text{if $n\nem$}
\end{cases}
\end{equation}
(which I got from here
http://www.mathtoweb.com/cgi-bin/mathtoweb_users_guide.pl , search for
'cases')
into the file math-to-web-with-plastex.org in this post:
http://permalink.gmane.org/gmane.emacs.orgmode/48815 and export as per
instructions.
There may be a similar error with equations containing '<', '>'.
Myles
