[XeTeX] strande behavior of Linux Libertine fonts with optio Fractions=On

[Philip Taylor (Webmaster, Ret'd)]

Tobias Schoel wrote:

> Why is it even necessary or wanted to typeset vulgar fractions of
> arbitrary length? Just using "1234/5678" seems to be adequate. That's
> the usual form in maths when the font size is so small, that
> \frac{1234}{5678} would be even smaller or disturbing if in the same size.

Would it be possible to set continuing fractions using the slash notation ?
Philip Taylor