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 699a8dc1f300998657c051518d936bd8642eb114..a1ba09c09ef59f6bec744cce4e7625afb3a87aa7 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
@@ -683,4 +683,13 @@ td.x-grid3-hd-over .x-grid3-hd-inner,td.sort-desc .x-grid3-hd-inner,td.sort-asc
 	border-top: none;
 	border-left: none;
 	border-right: none;
+}
+
+div.x-tab-panel-body.x-tab-panel-body-top {
+	border: none;
+}
+
+.x-small-editor.x-panel-header.x-component.x-unselectable {
+	border-top: none;
+	border-bottom: none;
 }
\ No newline at end of file