diff --git a/CHANGES b/CHANGES
index f41add77..2a07013a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,8 @@
+1.2.2
+ - Changed reduce to follow the letter of the spec with regard to having and
+   owning properties.
+ - Fixed a bug where RegExps pass as Functions in some engines in reduce.
+
 1.2.1
  - Adding few fixes to make jshint happy.
  - Fix for issue #12, function expressions can cause scoping issues in IE.
diff --git a/es5-shim.js b/es5-shim.js
index 3b1b7d1b..187148be 100644
--- a/es5-shim.js
+++ b/es5-shim.js
@@ -248,7 +248,7 @@ if (!Array.prototype.some) {
 if (!Array.prototype.reduce) {
     Array.prototype.reduce = function reduce(fun /*, initial*/) {
         var len = +this.length;
-        if (typeof fun !== "function")
+        if (typeof fun !== "function" || fun instanceof RegExp)
             throw new TypeError();
 
         // no value to return if no initial value and an empty array
@@ -280,6 +280,7 @@ if (!Array.prototype.reduce) {
     };
 }
 
+
 // ES5 15.4.4.22
 // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduceRight
 if (!Array.prototype.reduceRight) {
@@ -329,7 +330,7 @@ if (!Array.prototype.indexOf) {
         if (i < 0)
             i += length;
         for (; i < length; i++) {
-            if (!owns(this, i))
+            if (!(i in this))
                 continue;
             if (value === this[i])
                 return i;
@@ -349,7 +350,7 @@ if (!Array.prototype.lastIndexOf) {
             i += length;
         i = Math.min(i, length - 1);
         for (; i >= 0; i--) {
-            if (!owns(this, i))
+            if (!(i in this))
                 continue;
             if (value === this[i])
                 return i;
diff --git a/package.json b/package.json
index 9b856897..09c64c18 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "name": "es5-shim",
     "description": "ES5 as implementable on previous engines",
-    "version": "1.2.1",
+    "version": "1.2.2",
     "homepage": "http://github.com/kriskowal/es5-shim/",
     "contributors": [
         "Kris Kowal <kris@cixar.com> (http://github.com/kriskowal/)",