Update to Bootstrap 3.0.0

assets/less/bootstrap/button-groups.less

@@ -18,16 +18,18 @@
     border-top-color: #fff;
   }
 }
-.dropup .caret {
-  .btn-default & {
+.dropup {
+  & .btn-default .caret {
     border-bottom-color: @btn-default-color;
   }
-  .btn-primary &,
-  .btn-success &,
-  .btn-warning &,
-  .btn-danger &,
-  .btn-info & {
-    border-bottom-color: #fff;
+  .btn-primary,
+  .btn-success,
+  .btn-warning,
+  .btn-danger,
+  .btn-info {
+   .caret {
+      border-bottom-color: #fff;
+    }
   }
 }
 
@@ -157,11 +159,12 @@
 }
 // Carets in other button sizes
 .btn-lg .caret {
-  border-width: @caret-width-large;
+  border-width: @caret-width-large @caret-width-large 0;
+  border-bottom-width: 0;
 }
 // Upside down carets for .dropup
 .dropup .btn-lg .caret {
-  border-bottom-width: @caret-width-large;
+  border-width: 0 @caret-width-large @caret-width-large;
 }
 
 
@@ -229,6 +232,7 @@
   display: table;
   width: 100%;
   table-layout: fixed;
+  border-collapse: separate;
   .btn {
     float: none;
     display: table-cell;