diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index f42b5b57bf..75d6f207e9 100644
Binary files a/docs/assets/bootstrap.zip and b/docs/assets/bootstrap.zip differ
diff --git a/docs/assets/css/bootstrap-responsive.css b/docs/assets/css/bootstrap-responsive.css
index fb1d626927..da6440bd2f 100644
--- a/docs/assets/css/bootstrap-responsive.css
+++ b/docs/assets/css/bootstrap-responsive.css
@@ -1,3 +1,12 @@
+/*!
+ * Bootstrap Responsive v2.0.0
+ *
+ * Copyright 2012 Twitter, Inc
+ * Licensed under the Apache License v2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Designed and built with all the love in the world @twitter by @mdo and @fat.
+ */
 .hidden {
   display: none;
   visibility: hidden;
diff --git a/js/bootstrap-collapse.js b/js/bootstrap-collapse.js
index ee36840d2a..8134cc42ff 100644
--- a/js/bootstrap-collapse.js
+++ b/js/bootstrap-collapse.js
@@ -71,7 +71,7 @@
 
       this.$element
         .removeClass('collapse')
-        [dimension](size || '')
+        [dimension](size || 'auto')
         [0].offsetWidth
 
       this.$element.addClass('collapse')
diff --git a/less/responsive.less b/less/responsive.less
index 72fa213848..2ec57b478b 100644
--- a/less/responsive.less
+++ b/less/responsive.less
@@ -1,3 +1,13 @@
+/*!
+ * Bootstrap Responsive v2.0.0
+ *
+ * Copyright 2012 Twitter, Inc
+ * Licensed under the Apache License v2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Designed and built with all the love in the world @twitter by @mdo and @fat.
+ */
+
 // Responsive.less
 // For phone and tablet devices
 // -------------------------------------------------------------