[XeTeX] Bug with underbrace

[Nazareth.Kifle at lle.uib.no]

Ciao,
If your problem is related to the subscript '_' in the underbrace, you  
should use the command \sb instead of _ .
I had similar problem last week, and was fixed like this.
In my case the problem was related to the tree package gb4e. The  
subscript in the math environment was working together with the tree  
package.

Nazareth

Quoting Tobias Schoel <liesdiedatei at googlemail.com>:

> Hi,
>
> \underbrace is doing strange things. Minimal example:
>
> \documentclass{minimal}
> \usepackage{fontspec}
> \usepackage{unicode-math}
> \setmainfont{TeX Gyre Pagella}
> \setmathfont{Asana Math}
> \begin{document}
> \[\underbrace{123}_{456}\]
> \end{document}
>
> Why is that and how to help?
>
> ciao
>
> Toscho
>
>
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