[XeTeX] New environment fails in float

[Will Robertson]

On 2010-10-12 01:20:09 +1030, Gareth Hughes 
<garzohugo at gmail.com> said:

> I'm having problems with an environment definition. Using the xparse and
> etoolbox packages, I have created the environment syriacpoem in my .sty
> file.

Hi Gareth,

This appears to be a bug with nested environments in xparse. I've 
reported the bug and hopefully a fix will be forthcoming.

I'm not aware of an immediate workaround, I'm afraid. Perhaps for now 
you could define the example environment as a command and that might 
work instead? E.g., (untested)

\newsavebox\mysavebox
\newcommand\example[2]{%
  \begin{figure}[h]\centering
  \savebox\mysavebox{\parbox{#1}{#2}}%
  \ovalbox{\usebox\mysavebox}%
  \end{figure}
}
...
\example{\linewidth}{%
  \begin{syriacpoem}
  ...
}

Hope this helps,
Will