diff --git a/wp-includes/js/json2.dev.js b/wp-includes/js/json2.dev.js
index 8a7793b25f..b4c02d3f08 100644
--- a/wp-includes/js/json2.dev.js
+++ b/wp-includes/js/json2.dev.js
@@ -1,6 +1,6 @@
 /*
     http://www.JSON.org/json2.js
-    2009-08-17
+    2011-02-23
 
     Public Domain.
 
@@ -8,6 +8,14 @@
 
     See http://www.JSON.org/js.html
 
+
+    This code should be minified before deployment.
+    See http://javascript.crockford.com/jsmin.html
+
+    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+    NOT CONTROL.
+
+
     This file creates a global JSON object containing two methods: stringify
     and parse.
 
@@ -136,15 +144,9 @@
 
     This is a reference implementation. You are free to copy, modify, or
     redistribute.
-
-    This code should be minified before deployment.
-    See http://javascript.crockford.com/jsmin.html
-
-    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
-    NOT CONTROL.
 */
 
-/*jslint evil: true */
+/*jslint evil: true, strict: false, regexp: false */
 
 /*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
     call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
@@ -153,16 +155,17 @@
     test, toJSON, toString, valueOf
 */
 
-"use strict";
 
 // Create a JSON object only if one does not already exist. We create the
 // methods in a closure to avoid creating global variables.
 
-if (!this.JSON) {
-    this.JSON = {};
+var JSON;
+if (!JSON) {
+    JSON = {};
 }
 
 (function () {
+    "use strict";
 
     function f(n) {
         // Format integers to have at least two digits.
@@ -174,19 +177,19 @@ if (!this.JSON) {
         Date.prototype.toJSON = function (key) {
 
             return isFinite(this.valueOf()) ?
-                   this.getUTCFullYear()   + '-' +
-                 f(this.getUTCMonth() + 1) + '-' +
-                 f(this.getUTCDate())      + 'T' +
-                 f(this.getUTCHours())     + ':' +
-                 f(this.getUTCMinutes())   + ':' +
-                 f(this.getUTCSeconds())   + 'Z' : null;
+                this.getUTCFullYear()     + '-' +
+                f(this.getUTCMonth() + 1) + '-' +
+                f(this.getUTCDate())      + 'T' +
+                f(this.getUTCHours())     + ':' +
+                f(this.getUTCMinutes())   + ':' +
+                f(this.getUTCSeconds())   + 'Z' : null;
         };
 
-        String.prototype.toJSON =
-        Number.prototype.toJSON =
-        Boolean.prototype.toJSON = function (key) {
-            return this.valueOf();
-        };
+        String.prototype.toJSON      =
+            Number.prototype.toJSON  =
+            Boolean.prototype.toJSON = function (key) {
+                return this.valueOf();
+            };
     }
 
     var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
@@ -213,13 +216,11 @@ if (!this.JSON) {
 // sequences.
 
         escapable.lastIndex = 0;
-        return escapable.test(string) ?
-            '"' + string.replace(escapable, function (a) {
-                var c = meta[a];
-                return typeof c === 'string' ? c :
-                    '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
-            }) + '"' :
-            '"' + string + '"';
+        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
+            var c = meta[a];
+            return typeof c === 'string' ? c :
+                '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+        }) + '"' : '"' + string + '"';
     }
 
 
@@ -302,11 +303,9 @@ if (!this.JSON) {
 // Join all of the elements together, separated with commas, and wrap them in
 // brackets.
 
-                v = partial.length === 0 ? '[]' :
-                    gap ? '[\n' + gap +
-                            partial.join(',\n' + gap) + '\n' +
-                                mind + ']' :
-                          '[' + partial.join(',') + ']';
+                v = partial.length === 0 ? '[]' : gap ?
+                    '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
+                    '[' + partial.join(',') + ']';
                 gap = mind;
                 return v;
             }
@@ -316,8 +315,8 @@ if (!this.JSON) {
             if (rep && typeof rep === 'object') {
                 length = rep.length;
                 for (i = 0; i < length; i += 1) {
-                    k = rep[i];
-                    if (typeof k === 'string') {
+                    if (typeof rep[i] === 'string') {
+                        k = rep[i];
                         v = str(k, value);
                         if (v) {
                             partial.push(quote(k) + (gap ? ': ' : ':') + v);
@@ -329,7 +328,7 @@ if (!this.JSON) {
 // Otherwise, iterate through all of the keys in the object.
 
                 for (k in value) {
-                    if (Object.hasOwnProperty.call(value, k)) {
+                    if (Object.prototype.hasOwnProperty.call(value, k)) {
                         v = str(k, value);
                         if (v) {
                             partial.push(quote(k) + (gap ? ': ' : ':') + v);
@@ -341,9 +340,9 @@ if (!this.JSON) {
 // Join all of the member texts together, separated with commas,
 // and wrap them in braces.
 
-            v = partial.length === 0 ? '{}' :
-                gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' +
-                        mind + '}' : '{' + partial.join(',') + '}';
+            v = partial.length === 0 ? '{}' : gap ?
+                '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
+                '{' + partial.join(',') + '}';
             gap = mind;
             return v;
         }
@@ -384,7 +383,7 @@ if (!this.JSON) {
             rep = replacer;
             if (replacer && typeof replacer !== 'function' &&
                     (typeof replacer !== 'object' ||
-                     typeof replacer.length !== 'number')) {
+                    typeof replacer.length !== 'number')) {
                 throw new Error('JSON.stringify');
             }
 
@@ -414,7 +413,7 @@ if (!this.JSON) {
                 var k, v, value = holder[key];
                 if (value && typeof value === 'object') {
                     for (k in value) {
-                        if (Object.hasOwnProperty.call(value, k)) {
+                        if (Object.prototype.hasOwnProperty.call(value, k)) {
                             v = walk(value, k);
                             if (v !== undefined) {
                                 value[k] = v;
@@ -432,6 +431,7 @@ if (!this.JSON) {
 // Unicode characters with escape sequences. JavaScript handles many characters
 // incorrectly, either silently deleting them, or treating them as line endings.
 
+            text = String(text);
             cx.lastIndex = 0;
             if (cx.test(text)) {
                 text = text.replace(cx, function (a) {
@@ -453,10 +453,10 @@ if (!this.JSON) {
 // we look to see that the remaining characters are only whitespace or ']' or
 // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
 
-            if (/^[\],:{}\s]*$/.
-test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
-replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
-replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
+            if (/^[\],:{}\s]*$/
+                    .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
+                        .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
+                        .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
 
 // In the third stage we use the eval function to compile the text into a
 // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
@@ -478,4 +478,3 @@ replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
         };
     }
 }());
-
diff --git a/wp-includes/js/json2.js b/wp-includes/js/json2.js
index c2e6436635..0bdcc5ec97 100644
--- a/wp-includes/js/json2.js
+++ b/wp-includes/js/json2.js
@@ -1 +1 @@
-"use strict";if(!this.JSON){this.JSON={}}(function(){function f(n){return n<10?"0"+n:n}if(typeof Date.prototype.toJSON!=="function"){Date.prototype.toJSON=function(key){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null};String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(key){return this.valueOf()}}var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={"\b":"\\b","\t":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},rep;function quote(string){escapable.lastIndex=0;return escapable.test(string)?'"'+string.replace(escapable,function(a){var c=meta[a];return typeof c==="string"?c:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+string+'"'}function str(key,holder){var i,k,v,length,mind=gap,partial,value=holder[key];if(value&&typeof value==="object"&&typeof value.toJSON==="function"){value=value.toJSON(key)}if(typeof rep==="function"){value=rep.call(holder,key,value)}switch(typeof value){case"string":return quote(value);case"number":return isFinite(value)?String(value):"null";case"boolean":case"null":return String(value);case"object":if(!value){return"null"}gap+=indent;partial=[];if(Object.prototype.toString.apply(value)==="[object Array]"){length=value.length;for(i=0;i<length;i+=1){partial[i]=str(i,value)||"null"}v=partial.length===0?"[]":gap?"[\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"]":"["+partial.join(",")+"]";gap=mind;return v}if(rep&&typeof rep==="object"){length=rep.length;for(i=0;i<length;i+=1){k=rep[i];if(typeof k==="string"){v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}else{for(k in value){if(Object.hasOwnProperty.call(value,k)){v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}v=partial.length===0?"{}":gap?"{\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"}":"{"+partial.join(",")+"}";gap=mind;return v}}if(typeof JSON.stringify!=="function"){JSON.stringify=function(value,replacer,space){var i;gap="";indent="";if(typeof space==="number"){for(i=0;i<space;i+=1){indent+=" "}}else{if(typeof space==="string"){indent=space}}rep=replacer;if(replacer&&typeof replacer!=="function"&&(typeof replacer!=="object"||typeof replacer.length!=="number")){throw new Error("JSON.stringify")}return str("",{"":value})}}if(typeof JSON.parse!=="function"){JSON.parse=function(text,reviver){var j;function walk(holder,key){var k,v,value=holder[key];if(value&&typeof value==="object"){for(k in value){if(Object.hasOwnProperty.call(value,k)){v=walk(value,k);if(v!==undefined){value[k]=v}else{delete value[k]}}}}return reviver.call(holder,key,value)}cx.lastIndex=0;if(cx.test(text)){text=text.replace(cx,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})}if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,""))){j=eval("("+text+")");return typeof reviver==="function"?walk({"":j},""):j}throw new SyntaxError("JSON.parse")}}}());
\ No newline at end of file
+var JSON;if(!JSON){JSON={}}(function(){function f(n){return n<10?"0"+n:n}if(typeof Date.prototype.toJSON!=="function"){Date.prototype.toJSON=function(key){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null};String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(key){return this.valueOf()}}var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={"\b":"\\b","\t":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},rep;function quote(string){escapable.lastIndex=0;return escapable.test(string)?'"'+string.replace(escapable,function(a){var c=meta[a];return typeof c==="string"?c:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+string+'"'}function str(key,holder){var i,k,v,length,mind=gap,partial,value=holder[key];if(value&&typeof value==="object"&&typeof value.toJSON==="function"){value=value.toJSON(key)}if(typeof rep==="function"){value=rep.call(holder,key,value)}switch(typeof value){case"string":return quote(value);case"number":return isFinite(value)?String(value):"null";case"boolean":case"null":return String(value);case"object":if(!value){return"null"}gap+=indent;partial=[];if(Object.prototype.toString.apply(value)==="[object Array]"){length=value.length;for(i=0;i<length;i+=1){partial[i]=str(i,value)||"null"}v=partial.length===0?"[]":gap?"[\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"]":"["+partial.join(",")+"]";gap=mind;return v}if(rep&&typeof rep==="object"){length=rep.length;for(i=0;i<length;i+=1){if(typeof rep[i]==="string"){k=rep[i];v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}else{for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}v=partial.length===0?"{}":gap?"{\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"}":"{"+partial.join(",")+"}";gap=mind;return v}}if(typeof JSON.stringify!=="function"){JSON.stringify=function(value,replacer,space){var i;gap="";indent="";if(typeof space==="number"){for(i=0;i<space;i+=1){indent+=" "}}else{if(typeof space==="string"){indent=space}}rep=replacer;if(replacer&&typeof replacer!=="function"&&(typeof replacer!=="object"||typeof replacer.length!=="number")){throw new Error("JSON.stringify")}return str("",{"":value})}}if(typeof JSON.parse!=="function"){JSON.parse=function(text,reviver){var j;function walk(holder,key){var k,v,value=holder[key];if(value&&typeof value==="object"){for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=walk(value,k);if(v!==undefined){value[k]=v}else{delete value[k]}}}}return reviver.call(holder,key,value)}text=String(text);cx.lastIndex=0;if(cx.test(text)){text=text.replace(cx,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})}if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,""))){j=eval("("+text+")");return typeof reviver==="function"?walk({"":j},""):j}throw new SyntaxError("JSON.parse")}}}());
\ No newline at end of file
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index d896b75cad..50408f728c 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -243,7 +243,7 @@ function wp_default_scripts( &$scripts ) {
 
 	$scripts->add( 'comment-reply', "/wp-includes/js/comment-reply$suffix.js", false, '20090102');
 
-	$scripts->add( 'json2', "/wp-includes/js/json2$suffix.js", false, '20110113');
+	$scripts->add( 'json2', "/wp-includes/js/json2$suffix.js", false, '2011-02-23');
 
 	$scripts->add( 'imgareaselect', "/wp-includes/js/imgareaselect/jquery.imgareaselect$suffix.js", array('jquery'), '0.9.1-20110113' );
 	$scripts->add_data( 'imgareaselect', 'group', 1 );