From bfdb9c6b2202ef06385154a922875d5094702641 Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Tue, 15 Feb 2011 07:53:27 -0500
Subject: [PATCH] IE9-RC fixes filter problem, and changes the name of the
 performance object

---
 unpacked/MathJax.js | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/unpacked/MathJax.js b/unpacked/MathJax.js
index 054921763..9441815c2 100644
--- a/unpacked/MathJax.js
+++ b/unpacked/MathJax.js
@@ -885,10 +885,8 @@ MathJax.version = "1.0.11";
         } else if (styles[id] != null) {
           style = [];
           for (var name in styles[id]) {if (styles[id].hasOwnProperty(name)) {
-            if (styles[id][name] != null) {
-              if (name !== "filter" || !MathJax.Hub.Browser.isIE9 || !styles[id][name].match(/dropshadow/i))
-                {style[style.length] = name + ': ' + styles[id][name]}
-            }
+            if (styles[id][name] != null) 
+              {style[style.length] = name + ': ' + styles[id][name]}
           }}
           string += id +" {"+style.join('; ')+"}\n";
         }
@@ -1977,7 +1975,7 @@ MathJax.Hub.Startup = {
     },
     Opera: function (browser) {browser.version = opera.version()},
     MSIE: function (browser) {
-      browser.isIE9 = !!(document.documentMode && window.msPerformance);
+      browser.isIE9 = !!(document.documentMode && (window.performance || window.msPerformance));
       MathJax.HTML.setScriptBug = !browser.isIE9 || document.documentMode < 9;
     }
   });