diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index f1c99512118..efe220bf02b 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -1,4 +1,4 @@
-@charset "utf-8";
+@charset "UTF-8";
 @font-face {
   font-family: "mnmliconsRegular";
   src: url("/web/static/src/font/mnmliconsv21-webfont.eot") format("eot");
@@ -220,6 +220,9 @@
   padding: 16px;
 }
 .openerp.ui-dialog .ui-dialog-titlebar {
+  border-top: none;
+  border-left: none;
+  border-right: none;
   border-bottom: 1px solid #cacaca;
   -moz-border-radius: 2px 2px 0 0;
   -webkit-border-radius: 2px 2px 0 0;
@@ -236,9 +239,6 @@
   margin: 0;
   padding: 0;
 }
-.openerp.ui-dialog .ui-widget-header {
-  border: none;
-}
 .openerp.ui-dialog .ui-dialog-content {
   background: white;
 }
@@ -623,10 +623,6 @@
   display: block;
   color: gray;
 }
-.openerp .ui-tabs .oe_notebook.ui-tabs-nav li.ui-tabs-active { 
-  border-bottom: none;
-  padding-bottom: 1px;
-}
 .openerp .oe_notebook > li.ui-tabs-active > a {
   color: #4c4c4c;
 }
@@ -652,6 +648,10 @@
   background-color: #eeeeee;
   border-color: #eeeeee #eeeeee #dddddd;
 }
+.openerp .ui-tabs .oe_notebook.ui-tabs-nav li.ui-tabs-active {
+  border-bottom: none;
+  padding-bottom: 1px;
+}
 .openerp .oe_notebook > li.ui-state-active > a, .openerp .oe_notebook > li.ui-state-active > a:hover {
   background-color: white;
   border: 1px solid #dddddd;
diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index 28947b3b467..cc6c044f804 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -277,14 +277,15 @@ $sheet-padding: 16px
         .ui-dialog-titlebar, .ui-dialog-content, .ui-dialog-buttonpane
             padding: 16px
         .ui-dialog-titlebar
+            border-top: none
+            border-left: none
+            border-right: none
             border-bottom: 1px solid #cacaca
             @include radius(2px 2px 0 0)
             @include vertical-gradient(#FCFCFC, #DEDEDE)
             .ui-dialog-title
                 margin: 0
                 padding: 0
-        .ui-widget-header
-            border: none
         .ui-dialog-content
             background: white
         .ui-dialog-buttonpane