Original comment byJason McKesson (Bitbucket: alfonse, GitHub: alfonse):
This cannot be done, as neither SVGMath nor pMML2SVG works with OpenType files like the STIX fonts. Most Windows fonts don't have the combining characters in them, and those that do like Cambria Math are not widely used.
Originally reported by: Jason McKesson (Bitbucket: alfonse, GitHub: alfonse)
Try to change vector arrowheads on MathML files to combining characters. Test with Chrome and IE9.