From df61c069a017b02cc873b234209f7d97433662ad Mon Sep 17 00:00:00 2001
From: Sean Hogan <shogun70@gmail.com>
Date: Fri, 29 Oct 2010 11:13:39 +1100
Subject: [PATCH] IE <= 8 parses MathML incorrectly. MathJax implements an
 alternative code path to get around this problem. This code was executed for
 all versions of IE, but IE9 parses MathML correctly, so this fix implements
 feature detection of MathML parsing.

---
 mathjax/unpacked/extensions/mml2jax.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mathjax/unpacked/extensions/mml2jax.js b/mathjax/unpacked/extensions/mml2jax.js
index 426ebc2eb..f9fbe3e69 100644
--- a/mathjax/unpacked/extensions/mml2jax.js
+++ b/mathjax/unpacked/extensions/mml2jax.js
@@ -142,10 +142,10 @@ MathJax.Hub.Browser.Select({
   MSIE: function (browser) {
     MathJax.Hub.Insert(MathJax.Extension.mml2jax,{
       msieScriptBug: true,
-      msieMathTagBug: true
-    })
+      msieMathTagBug: (MathJax.HTML.Element("span", {innerHTML:"<math><mi>x</mi></math>"}).childNodes.length !== 1) // IE < 9 corrupts MathML
+    });
   }
 });
-  
+
 MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.mml2jax]);
 MathJax.Ajax.loadComplete("[MathJax]/extensions/mml2jax.js");