diff --git a/lib/button-groups.less b/lib/button-groups.less
index e9724ba8c2..8f4bbc5107 100644
--- a/lib/button-groups.less
+++ b/lib/button-groups.less
@@ -88,7 +88,7 @@
 // Reposition menu on open and round all corners
 .btn-group.open .dropdown-menu {
   display: block;
-  top: 30px;
+  margin-top: 1px;
   .border-radius(5px);
   &.large { top: 40px; }
 }
diff --git a/lib/dropdowns.less b/lib/dropdowns.less
index 08054713ce..d0316f145d 100644
--- a/lib/dropdowns.less
+++ b/lib/dropdowns.less
@@ -30,7 +30,7 @@
 // The dropdown menu (ul)
 .dropdown-menu {
   position: absolute;
-  top: 40px;
+  top: 100%;
   z-index: @zindexDropdown;
   float: left;
   display: none; // none by default, but block on "open" of the menu
diff --git a/lib/navbar.less b/lib/navbar.less
index 94bc652410..f38459a72f 100644
--- a/lib/navbar.less
+++ b/lib/navbar.less
@@ -191,7 +191,7 @@
 
 // Menu position and menu carets
 .navbar .dropdown-menu {
-  top: 41px;
+  margin-top: 1px;
   .border-radius(4px);
   &:before {
     content: '';
diff --git a/lib/navs.less b/lib/navs.less
index 432ab3cbd1..edc0d238fb 100644
--- a/lib/navs.less
+++ b/lib/navs.less
@@ -177,7 +177,7 @@
 // Position the menu
 .pills .dropdown-menu,
 .tabs .dropdown-menu {
-  top: 33px;
+  margin-top: 1px;
   border-width: 1px;
 }
 .pills .dropdown-menu {
@@ -239,7 +239,7 @@
 
 
 // COMMON STYLES
-// ------------- 
+// -------------
 
 // Clear any floats
 .tabbable {