diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/css/gxt-gray.css b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/css/gxt-gray.css
index 6f4e0d8b862285c5e23e77262fa7b1c6d8868a3d..8d8fd7419001ef5342b7a1db13a62dfb736259de 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/css/gxt-gray.css
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/css/gxt-gray.css
@@ -273,6 +273,11 @@ ul.x-tab-strip-bottom{
 	background-image:url(../images/gray/tabs/tab-close.gif);
 }
 
+li.x-tab-strip-closable.x-component,
+li.x-tab-with-icon.x-component {
+	border: 1px solid rgb(208, 208, 208);
+	border-bottom: none;
+}
 .x-tab-panel-body {
     border-color:#d0d0d0;
     background:#fff;