diff --git a/dist/css/bootstrap.css b/dist/css/bootstrap.css
index 8e8842cc4..1173f19f2 100644
--- a/dist/css/bootstrap.css
+++ b/dist/css/bootstrap.css
@@ -1660,7 +1660,6 @@ input[type="radio"],
 input[type="checkbox"] {
   margin: 4px 0 0;
   margin-top: 1px \9;
-  /* IE8-9 */
   line-height: normal;
 }
 input[type="file"] {
diff --git a/dist/css/bootstrap.css.map b/dist/css/bootstrap.css.map
index c3701fa64..23b28dbf0 100644
Binary files a/dist/css/bootstrap.css.map and b/dist/css/bootstrap.css.map differ
diff --git a/docs/dist/css/bootstrap.css.map b/docs/dist/css/bootstrap.css.map
index c3701fa64..23b28dbf0 100644
Binary files a/docs/dist/css/bootstrap.css.map and b/docs/dist/css/bootstrap.css.map differ
diff --git a/package.json b/package.json
index 553165f98..1b64c92e5 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,8 @@
     "grunt-saucelabs": "~5.0.0",
     "grunt-sed": "~0.1.1",
     "load-grunt-tasks": "~0.3.0",
-    "markdown": "~0.5.0"
+    "markdown": "~0.5.0",
+    "css-flip": "~0.3.0"
   },
   "jspm": {
     "main": "js/bootstrap",