Strengthen the UMD.

lodash.js

@@ -135,10 +135,13 @@
   var root = (objectTypes[typeof window] && window) || this;
 
   /** Detect free variable `exports` */
-  var freeExports = objectTypes[typeof exports] && exports;
+  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
 
   /** Detect free variable `module` */
-  var freeModule = objectTypes[typeof module] && module && module.exports == freeExports && module;
+  var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
+
+  /** Detect the popular CommonJS extension `module.exports` */
+  var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;
 
   /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
   var freeGlobal = objectTypes[typeof global] && global;
@@ -733,14 +736,6 @@
        */
       support.funcNames = typeof Function.name == 'string';
 
-      /**
-       * Detect if own properties are iterated after inherited properties (all but IE < 9).
-       *
-       * @memberOf _.support
-       * @type boolean
-       */
-      support.ownLast = props[0] != 'x';
-
       /**
        * Detect if `arguments` object indexes are non-enumerable
        * (Firefox < 4, IE < 9, PhantomJS, Safari < 5.1).
@@ -761,6 +756,14 @@
        */
       support.nonEnumShadows = !/valueOf/.test(props);
 
+      /**
+       * Detect if own properties are iterated after inherited properties (all but IE < 9).
+       *
+       * @memberOf _.support
+       * @type boolean
+       */
+      support.ownLast = props[0] != 'x';
+
       /**
        * Detect if `Array#shift` and `Array#splice` augment array-like objects correctly.
        *
@@ -5566,7 +5569,7 @@
       return setTimeout(function() { func.apply(undefined, args); }, 1);
     }
     // use `setImmediate` if available in Node.js
-    if (isV8 && freeModule && typeof setImmediate == 'function') {
+    if (isV8 && moduleExports && typeof setImmediate == 'function') {
       defer = function(func) {
         if (!isFunction(func)) {
           throw new TypeError;
@@ -6698,12 +6701,12 @@
     });
   }
   // check for `exports` after `define` in case a build optimizer adds an `exports` object
-  else if (freeExports && !freeExports.nodeType) {
-    // in Node.js or RingoJS v0.8.0+
-    if (freeModule) {
+  else if (freeExports && freeModule) {
+    // in Node.js or RingoJS
+    if (moduleExports) {
       (freeModule.exports = _)._ = _;
     }
-    // in Narwhal or RingoJS v0.7.0-
+    // in Narwhal or Rhino -require
     else {
       freeExports._ = _;
     }