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 11141255d4861ab91dcc2b7e6357e6cc3162b9dc..9467cf55319c5bf9da665fa2c6d2b60083e00543 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
@@ -143,29 +143,8 @@
 
 
 /* qtips */
-.x-tip .x-tip-top {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
-}
-.x-tip .x-tip-top-left {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
-}
-.x-tip .x-tip-top-right {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
-}
-.x-tip .x-tip-ft {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
-}
-.x-tip .x-tip-ft-left {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
-}
-.x-tip .x-tip-ft-right {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
-}
-.x-tip .x-tip-bd-left {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
-}
-.x-tip .x-tip-bd-right {
-	background-image:url(../images/gray/qtip/tip-sprite.gif);
+.x-tip .x-tip-tc, .x-tip .x-tip-tl, .x-tip .x-tip-tr, .x-tip .x-tip-bc, .x-tip .x-tip-bl, .x-tip .x-tip-br, .x-tip .x-tip-ml, .x-tip .x-tip-mr {
+	background-image: url(../images/gray/qtip/tip-sprite.gif);
 }
 
 /* Toolbars */
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/qtip/tip-sprite.gif b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/qtip/tip-sprite.gif
index 472c4c25a7ed21fab3620f0adb32a08b294ed3cd..7ad7becc266af785d8ae069caec4da4a7e32b17c 100644
Binary files a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/qtip/tip-sprite.gif and b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/images/gray/qtip/tip-sprite.gif differ