diff --git a/docs/assets/css/bootstrap-responsive.css b/docs/assets/css/bootstrap-responsive.css
index f4a0e81f86..daafa91808 100644
--- a/docs/assets/css/bootstrap-responsive.css
+++ b/docs/assets/css/bootstrap-responsive.css
@@ -808,6 +808,7 @@
   }
   .thumbnails > li {
     float: none;
+    margin-left: 0;
   }
   [class*="span"],
   .row-fluid [class*="span"] {
diff --git a/less/responsive-767px-max.less b/less/responsive-767px-max.less
index 23a6ce86b0..b2e3da25c0 100644
--- a/less/responsive-767px-max.less
+++ b/less/responsive-767px-max.less
@@ -53,7 +53,7 @@
   }
   .thumbnails > li {
     float: none;
-    margin-left: 0;
+    margin-left: 0; // Reset the default margin for all li elements when no .span* classes are present
   }
   // Make all grid-sized elements block level again
   [class*="span"],