Hi all,

> >I've been trying to use the \overrightarrow command within a metapost graphic,
> >but it doesn't work. Math mode does work, for example \vec works like
> >expected. Outside of metapost, \overrightarrow works as expected.
This seems to broken for extensible math arrows like \xrightarrow as well.

> \let\normaloverrightarrow\overrightarrow
> \unexpanded\def\overrightarrow{\normaloverrightarrow}
And this fix helps there as well. Could this perhaps be fixed in general for
all extensible arrows?

Gr.

Matthijs