diff --git a/test/test.js b/test/test.js
index 4cf17f350..06972c0af 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1833,7 +1833,7 @@
 
     asyncTest('should trigger trailing call when invoked repeatedly', function() {
       var counter = 0,
-          limit = 80,
+          limit = 48,
           throttled = _.throttle(function() { counter++; }, 32),
           start = new Date;
 
diff --git a/vendor/underscore/test/functions.js b/vendor/underscore/test/functions.js
index de141729c..2641dfbd2 100644
--- a/vendor/underscore/test/functions.js
+++ b/vendor/underscore/test/functions.js
@@ -95,80 +95,67 @@ $(document).ready(function() {
   asyncTest("throttle", 2, function() {
     var counter = 0;
     var incr = function(){ counter++; };
-    var throttledIncr = _.throttle(incr, 100);
-    throttledIncr(); throttledIncr(); throttledIncr();
-    setTimeout(throttledIncr, 70);
-    setTimeout(throttledIncr, 120);
-    setTimeout(throttledIncr, 140);
-    setTimeout(throttledIncr, 190);
-    setTimeout(throttledIncr, 220);
-    setTimeout(throttledIncr, 240);
-    _.delay(function(){ equal(counter, 1, "incr was called immediately"); }, 30);
-    _.delay(function(){ equal(counter, 4, "incr was throttled"); start(); }, 400);
+    var throttledIncr = _.throttle(incr, 32);
+    throttledIncr(); throttledIncr();
+
+    equal(counter, 1, "incr was called immediately");
+    _.delay(function(){ equal(counter, 2, "incr was throttled"); start(); }, 64);
   });
 
   asyncTest("throttle arguments", 2, function() {
     var value = 0;
     var update = function(val){ value = val; };
-    var throttledUpdate = _.throttle(update, 100);
-    throttledUpdate(1); throttledUpdate(2); throttledUpdate(3);
-    setTimeout(function(){ throttledUpdate(4); }, 120);
-    setTimeout(function(){ throttledUpdate(5); }, 140);
-    setTimeout(function(){ throttledUpdate(6); }, 250);
-    _.delay(function(){ equal(value, 1, "updated to latest value"); }, 40);
-    _.delay(function(){ equal(value, 6, "updated to latest value"); start(); }, 400);
+    var throttledUpdate = _.throttle(update, 32);
+    throttledUpdate(1); throttledUpdate(2);
+    _.delay(function(){ throttledUpdate(3); }, 64);
+    equal(value, 1, "updated to latest value");
+    _.delay(function(){ equal(value, 3, "updated to latest value"); start(); }, 96);
   });
 
   asyncTest("throttle once", 2, function() {
     var counter = 0;
     var incr = function(){ return ++counter; };
-    var throttledIncr = _.throttle(incr, 100);
+    var throttledIncr = _.throttle(incr, 32);
     var result = throttledIncr();
     _.delay(function(){
       equal(result, 1, "throttled functions return their value");
       equal(counter, 1, "incr was called once"); start();
-    }, 220);
+    }, 64);
   });
 
   asyncTest("throttle twice", 1, function() {
     var counter = 0;
     var incr = function(){ counter++; };
-    var throttledIncr = _.throttle(incr, 100);
+    var throttledIncr = _.throttle(incr, 32);
     throttledIncr(); throttledIncr();
-    _.delay(function(){ equal(counter, 2, "incr was called twice"); start(); }, 220);
+    _.delay(function(){ equal(counter, 2, "incr was called twice"); start(); }, 64);
   });
 
-  asyncTest("throttle repeatedly with results", 9, function() {
+  asyncTest("throttle repeatedly with results", 6, function() {
     var counter = 0;
     var incr = function(){ return ++counter; };
-    var throttledIncr = _.throttle(incr, 100);
+    var throttledIncr = _.throttle(incr, 64);
     var results = [];
     var saveResult = function() { results.push(throttledIncr()); };
-    saveResult(); saveResult(); saveResult();
-    setTimeout(saveResult, 70);
-    setTimeout(saveResult, 120);
-    setTimeout(saveResult, 140);
-    setTimeout(saveResult, 190);
-    setTimeout(saveResult, 240);
-    setTimeout(saveResult, 260);
+    saveResult(); saveResult();
+    _.delay(saveResult, 32);
+    _.delay(saveResult, 80);
+    _.delay(saveResult, 96);
+    _.delay(saveResult, 144);
     _.delay(function() {
       equal(results[0], 1, "incr was called once");
       equal(results[1], 1, "incr was throttled");
       equal(results[2], 1, "incr was throttled");
-      equal(results[3], 1, "incr was throttled");
-      equal(results[4], 2, "incr was called twice");
-      equal(results[5], 2, "incr was throttled");
-      equal(results[6], 2, "incr was throttled");
-      equal(results[7], 3, "incr was called thrice");
-      equal(results[8], 3, "incr was throttled");
+      equal(results[3], 2, "incr was called twice");
+      equal(results[4], 2, "incr was throttled");
+      equal(results[5], 3, "incr was called trailing");
       start();
-    }, 400);
+    }, 192);
   });
 
-  asyncTest("throttle triggers trailing call after repeatedly invoked", 2, function() {
-    var actual;
+  asyncTest("throttle triggers trailing call when invoked repeatedly", 2, function() {
     var counter = 0;
-    var limit = 80;
+    var limit = 48;
     var incr = function(){ counter++; };
     var throttledIncr = _.throttle(incr, 32);
 
@@ -176,62 +163,49 @@ $(document).ready(function() {
     while ((new Date - stamp) < limit) {
       throttledIncr();
     }
-    _.delay(function() {
-      actual = counter + 2;
-      throttledIncr();
-      throttledIncr();
-    }, 64);
-
-    _.delay(function() {
-      equal(counter, actual);
-      start();
-    }, 128);
-
+    var lastCount = counter;
     ok(counter > 1);
+
+    _.delay(function() {
+      ok(counter > lastCount);
+      start();
+    }, 96);
   });
 
   asyncTest("debounce", 1, function() {
     var counter = 0;
     var incr = function(){ counter++; };
-    var debouncedIncr = _.debounce(incr, 50);
-    debouncedIncr(); debouncedIncr(); debouncedIncr();
-    setTimeout(debouncedIncr, 30);
-    setTimeout(debouncedIncr, 60);
-    setTimeout(debouncedIncr, 90);
-    setTimeout(debouncedIncr, 120);
-    setTimeout(debouncedIncr, 150);
-    _.delay(function(){ equal(counter, 1, "incr was debounced"); start(); }, 220);
+    var debouncedIncr = _.debounce(incr, 32);
+    debouncedIncr(); debouncedIncr();
+    _.delay(debouncedIncr, 16);
+    _.delay(function(){ equal(counter, 1, "incr was debounced"); start(); }, 96);
   });
 
-  asyncTest("debounce asap", 5, function() {
-    var a, b, c;
+  asyncTest("debounce asap", 4, function() {
+    var a, b;
     var counter = 0;
     var incr = function(){ return ++counter; };
-    var debouncedIncr = _.debounce(incr, 50, true);
+    var debouncedIncr = _.debounce(incr, 64, true);
     a = debouncedIncr();
     b = debouncedIncr();
-    c = debouncedIncr();
     equal(a, 1);
     equal(b, 1);
-    equal(c, 1);
     equal(counter, 1, 'incr was called immediately');
-    setTimeout(debouncedIncr, 30);
-    setTimeout(debouncedIncr, 60);
-    setTimeout(debouncedIncr, 90);
-    setTimeout(debouncedIncr, 120);
-    setTimeout(debouncedIncr, 150);
-    _.delay(function(){ equal(counter, 1, "incr was debounced"); start(); }, 220);
+    _.delay(debouncedIncr, 16);
+    _.delay(debouncedIncr, 32);
+    _.delay(debouncedIncr, 48);
+    _.delay(function(){ equal(counter, 1, "incr was debounced"); start(); }, 128);
   });
 
   asyncTest("debounce asap recursively", 2, function() {
     var counter = 0;
     var debouncedIncr = _.debounce(function(){
       counter++;
-      if (counter < 5) debouncedIncr();
-    }, 50, true);
+      if (counter < 10) debouncedIncr();
+    }, 32, true);
     debouncedIncr();
-    equal(counter, 1, 'incr was called immediately');
-    _.delay(function(){ equal(counter, 1, "incr was debounced"); start(); }, 70);
+    equal(counter, 1, "incr was called immediately");
+    _.delay(function(){ equal(counter, 1, "incr was debounced"); start(); }, 96);
   });
 
   test("once", function() {
diff --git a/vendor/underscore/underscore-min.js b/vendor/underscore/underscore-min.js
index 16a5f62c0..867609201 100644
--- a/vendor/underscore/underscore-min.js
+++ b/vendor/underscore/underscore-min.js
@@ -2,4 +2,4 @@
 //     http://underscorejs.org
 //     (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
 //     Underscore may be freely distributed under the MIT license.
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a+=n.slice(i,o).replace(D,function(n){return"\\"+B[n]}),r&&(a+="'+\n((__t=("+r+"))==null?'':_.escape(__t))+\n'"),e&&(a+="'+\n((__t=("+e+"))==null?'':__t)+\n'"),u&&(a+="';\n"+u+"\n__p+='"),i=o+t.length,t}),a+="';\n",r.variable||(a="with(obj||{}){\n"+a+"}\n"),a="var __t,__p='',__j=Array.prototype.join,print=function(){__p+=__j.call(arguments,'');};\n"+a+"return __p;\n";try{e=Function(r.variable||"obj","_",a)}catch(o){throw o.source=a,o}if(t)return e(t,w);var c=function(n){return e.call(this,n,w)};return c.source="function("+(r.variable||"obj")+"){\n"+a+"}",c},w.chain=function(n){return w(n).chain()};var z=function(n){return this._chain?w(n).chain():n};w.mixin(w),A(["pop","push","reverse","shift","sort","splice","unshift"],function(n){var t=e[n];w.prototype[n]=function(){var r=this._wrapped;return t.apply(r,arguments),"shift"!=n&&"splice"!=n||0!==r.length||delete r[0],z.call(this,r)}}),A(["concat","join","slice"],function(n){var t=e[n];w.prototype[n]=function(){return 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\ No newline at end of file
diff --git a/vendor/underscore/underscore.js b/vendor/underscore/underscore.js
index b943608c9..b2619be82 100644
--- a/vendor/underscore/underscore.js
+++ b/vendor/underscore/underscore.js
@@ -938,8 +938,8 @@
     return obj === Object(obj);
   };
 
-  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp.
-  each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) {
+  // Add some isType methods: isArguments, isString, isNumber, isDate, isRegExp.
+  each(['Arguments', 'String', 'Number', 'Date', 'RegExp'], function(name) {
     _['is' + name] = function(obj) {
       return toString.call(obj) == '[object ' + name + ']';
     };
@@ -953,10 +953,16 @@
     };
   }
 
-  // Optimize `isFunction` if appropriate.
-  if (typeof (/./) !== 'function') {
+  // Is a given variable a function?
+  _.isFunction = function(obj) {
+    return typeof obj === 'function';
+  };
+
+  // Define a fallback for older versions of Chrome, Firefox, and Safari, where
+  // a regexp is `typeof` "function".
+  if (_.isFunction(/./)) {
     _.isFunction = function(obj) {
-      return typeof obj === 'function';
+      return toString.call(obj) == '[object Function]';
     };
   }