diff --git a/underscore.js b/underscore.js
index 87455c6d4..ffacf6b30 100644
--- a/underscore.js
+++ b/underscore.js
@@ -65,7 +65,7 @@
   var each = _.forEach = function(obj, iterator, context) {
     var index = 0;
     try {
-      if (obj.forEach === nativeForEach) {
+      if (nativeForEach && obj.forEach === nativeForEach) {
         obj.forEach(iterator, context);
       } else if (_.isNumber(obj.length)) {
         for (var i = 0, l = obj.length; i < l; i++) iterator.call(context, obj[i], i, obj);
@@ -83,7 +83,7 @@
   // Return the results of applying the iterator to each element.
   // Delegates to JavaScript 1.6's native map if available.
   _.map = function(obj, iterator, context) {
-    if (obj.map === nativeMap) return obj.map(iterator, context);
+    if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
     var results = [];
     each(obj, function(value, index, list) {
       results.push(iterator.call(context, value, index, list));
@@ -94,7 +94,7 @@
   // Reduce builds up a single result from a list of values, aka inject, or foldl.
   // Delegates to JavaScript 1.8's native reduce if available.
   _.reduce = function(obj, memo, iterator, context) {
-    if (obj.reduce === nativeReduce) return obj.reduce(_.bind(iterator, context), memo);
+    if (nativeReduce && obj.reduce === nativeReduce) return obj.reduce(_.bind(iterator, context), memo);
     each(obj, function(value, index, list) {
       memo = iterator.call(context, memo, value, index, list);
     });
@@ -104,9 +104,9 @@
   // The right-associative version of reduce, also known as foldr. Uses
   // Delegates to JavaScript 1.8's native reduceRight if available.
   _.reduceRight = function(obj, memo, iterator, context) {
-    if (obj.reduceRight === nativeReduceRight) return obj.reduceRight(_.bind(iterator, context), memo);
+    if (nativeReduceRight && obj.reduceRight === nativeReduceRight) return obj.reduceRight(_.bind(iterator, context), memo);
     var reversed = _.clone(_.toArray(obj)).reverse();
-    return reduce(reversed, memo, iterator, context);
+    return _.reduce(reversed, memo, iterator, context);
   };
 
   // Return the first value which passes a truth test.
@@ -124,7 +124,7 @@
   // Return all the elements that pass a truth test.
   // Delegates to JavaScript 1.6's native filter if available.
   _.filter = function(obj, iterator, context) {
-    if (obj.filter === nativeFilter) return obj.filter(iterator, context);
+    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
     var results = [];
     each(obj, function(value, index, list) {
       iterator.call(context, value, index, list) && results.push(value);
@@ -145,7 +145,7 @@
   // Delegates to JavaScript 1.6's native every if available.
   _.every = function(obj, iterator, context) {
     iterator = iterator || _.identity;
-    if (obj.every === nativeEvery) return obj.every(iterator, context);
+    if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
     var result = true;
     each(obj, function(value, index, list) {
       if (!(result = result && iterator.call(context, value, index, list))) _.breakLoop();
@@ -157,7 +157,7 @@
   // Delegates to JavaScript 1.6's native some if available.
   _.some = function(obj, iterator, context) {
     iterator = iterator || _.identity;
-    if (obj.some === nativeSome) return obj.some(iterator, context);
+    if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
     var result = false;
     each(obj, function(value, index, list) {
       if (result = iterator.call(context, value, index, list)) _.breakLoop();
@@ -167,10 +167,12 @@
 
   // Determine if a given value is included in the array or object using '==='.
   _.include = function(obj, target) {
-    if (obj && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
-    return !! _.detect(obj, function(value) {
-      return value === target;
+    if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
+    var found = false;
+    each(obj, function(value) {
+      if (found = value === target) _.breakLoop();
     });
+    return found;
   };
 
   // Invoke a method with arguments on every item in a collection.
@@ -271,7 +273,7 @@
 
   // Trim out all falsy values from an array.
   _.compact = function(array) {
-    return _.select(array, function(value){ return !!value; });
+    return _.filter(array, function(value){ return !!value; });
   };
 
   // Return a completely flattened version of an array.
@@ -286,7 +288,7 @@
   // Return a version of the array that does not contain the specified value(s).
   _.without = function(array) {
     var values = _.rest(arguments);
-    return _.select(array, function(value){ return !_.include(values, value); });
+    return _.filter(array, function(value){ return !_.include(values, value); });
   };
 
   // Produce a duplicate-free version of the array. If the array has already
@@ -302,8 +304,8 @@
   // passed-in arrays.
   _.intersect = function(array) {
     var rest = _.rest(arguments);
-    return _.select(_.uniq(array), function(item) {
-      return _.all(rest, function(other) {
+    return _.filter(_.uniq(array), function(item) {
+      return _.every(rest, function(other) {
         return _.indexOf(other, item) >= 0;
       });
     });
@@ -324,7 +326,7 @@
   // item in an array, or -1 if the item is not included in the array.
   // Delegates to JavaScript 1.8's native indexOf if available.
   _.indexOf = function(array, item) {
-    if (array.indexOf === nativeIndexOf) return array.indexOf(item);
+    if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
     for (var i = 0, l = array.length; i < l; i++) if (array[i] === item) return i;
     return -1;
   };
@@ -332,7 +334,7 @@
 
   // Delegates to JavaScript 1.6's native lastIndexOf if available.
   _.lastIndexOf = function(array, item) {
-    if (array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
+    if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
     var i = array.length;
     while (i--) if (array[i] === item) return i;
     return -1;
@@ -428,7 +430,7 @@
 
   // Return a sorted list of the function names available on the object.
   _.functions = function(obj) {
-    return _.select(_.keys(obj), function(key){ return _.isFunction(obj[key]); }).sort();
+    return _.filter(_.keys(obj), function(key){ return _.isFunction(obj[key]); }).sort();
   };
 
   // Extend a given object with all of the properties in a source object.
@@ -577,7 +579,7 @@
   // Add your own custom functions to the Underscore object, ensuring that
   // they're correctly added to the OOP wrapper as well.
   _.mixin = function(obj) {
-    _.each(_.functions(obj), function(name){
+    each(_.functions(obj), function(name){
       addToWrapper(name, _[name] = obj[name]);
     });
   };
@@ -601,13 +603,15 @@
   // JavaScript templating a-la ERB, pilfered from John Resig's
   // "Secrets of the JavaScript Ninja", page 83.
   // Single-quote fix from Rick Strahl's version.
+  // With alterations for arbitrary delimiters.
   _.template = function(str, data) {
     var c  = _.templateSettings;
+    var endMatch = new RegExp("'(?=[^"+c.end.substr(0, 1)+"]*"+escapeRegExp(c.end)+")","g");
     var fn = new Function('obj',
       'var p=[],print=function(){p.push.apply(p,arguments);};' +
       'with(obj){p.push(\'' +
       str.replace(/[\r\t\n]/g, " ")
-         .replace(new RegExp("'(?=[^"+c.end[0]+"]*"+escapeRegExp(c.end)+")","g"),"\t")
+         .replace(endMatch,"\t")
          .split("'").join("\\'")
          .split("\t").join("'")
          .replace(c.interpolate, "',$1,'")