[XeTeX] accent circumflex with unicode-math

[Tobias Schoel]

Hi,

minimal example:

\documentclass{minimal}

\usepackage{fontspec}
\usepackage{unicode-math}

\setmainfont[Ligatures=TeX]{TeX Gyre Pagella}
\setmathfont[Scale=MatchUppercase]{Asana Math}

\begin{document}

\[\hat u\hat\imath\]

\end{document}

The accents have different width. This might be wanted in text mode, but 
in math mode it looks rather strange.

What's the reason for this behaviour and how to change it?

bye Toscho

PS: Attachment is a screenshot from the above document.
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