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 8d8fd7419001ef5342b7a1db13a62dfb736259de..c1a6b314da57015d1b9492ba712a4242b4791892 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
@@ -268,6 +268,10 @@ ul.x-tab-strip-bottom{
 
 .x-tab-strip .x-tab-strip-closable a.x-tab-strip-close {
 	background-image:url(../images/gray/tabs/tab-close.gif);
+	width: 15px;
+	height: 15px;
+	top: 0px;
+	right: 0px;
 }
 .x-tab-strip .x-tab-strip-closable a.x-tab-strip-close:hover{
 	background-image:url(../images/gray/tabs/tab-close.gif);
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/tabs/tab-close.gif b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/tabs/tab-close.gif
index 98d5da9528411ee291e0548246d9c86a82455d32..5940a024daa5f818011e8512d73c57b77a7b1a18 100644
Binary files a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/tabs/tab-close.gif and b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/tabs/tab-close.gif differ