Run grunt.

dist/css/bootstrap.css

@@ -3676,7 +3676,8 @@ tbody.collapse.in {
 .navbar-fixed-bottom .dropdown .caret {
   content: "";
   border-top: 0;
-  border-bottom: 4px solid;
+  border-bottom: 4px dashed;
+  border-bottom: 4px solid \9;
 }
 .dropup .dropdown-menu,
 .navbar-fixed-bottom .dropdown .dropdown-menu {

dist/js/bootstrap.js

@@ -854,7 +854,7 @@ if (typeof jQuery === 'undefined') {
     }
 
     var desc = ' li:not(.disabled):visible a'
-    var $items = $parent.find('[role="menu"]' + desc + ', [role="listbox"]' + desc)
+    var $items = $parent.find('.dropdown-menu' + desc)
 
     if (!$items.length) return
 

docs/dist/css/bootstrap.css

@@ -3676,7 +3676,8 @@ tbody.collapse.in {
 .navbar-fixed-bottom .dropdown .caret {
   content: "";
   border-top: 0;
-  border-bottom: 4px solid;
+  border-bottom: 4px dashed;
+  border-bottom: 4px solid \9;
 }
 .dropup .dropdown-menu,
 .navbar-fixed-bottom .dropdown .dropdown-menu {

docs/dist/js/bootstrap.js

@@ -854,7 +854,7 @@ if (typeof jQuery === 'undefined') {
     }
 
     var desc = ' li:not(.disabled):visible a'
-    var $items = $parent.find('[role="menu"]' + desc + ', [role="listbox"]' + desc)
+    var $items = $parent.find('.dropdown-menu' + desc)
 
     if (!$items.length) return