MathML pre-processing fails in IE9

Created by: shogun70

Using IE9 platform preview 5:

1. Visit http://s3.amazonaws.com/dist-meekostuff-net/MathJax/default/test/sample-mml.html
2. Force the browser into IE9 standards mode
3. The browser notifies an error in mml2jax
4. Math content is not rendered:

• inline math doesn't seem to be detected
• display mode math is detected, but is processed incorrectly.

The incorrect processing may be due to IE9 capability to parse MathML correctly.