Index: typo3/sysext/t3skin/extjs/xtheme-t3skin.css
===================================================================
--- typo3/sysext/t3skin/extjs/xtheme-t3skin.css	(revision 10333)
+++ typo3/sysext/t3skin/extjs/xtheme-t3skin.css	(revision )
@@ -1317,7 +1317,8 @@
 }
 
 .x-tree-node-expanded .x-tree-node-icon{
-	background-image:url(images/tree/folder-open.gif);
+	background-image:url(../images/sprites/t3skin.png);
+	background-position: -18px -214px;
 }
 
 .x-tree-node-leaf .x-tree-node-icon{
@@ -1325,7 +1326,8 @@
 }
 
 .x-tree-node-collapsed .x-tree-node-icon{
-	background-image:url(images/tree/folder.gif);
+	background-image:url(../images/sprites/t3skin.png);
+	background-position: -288px -90px;
 }
 
 .x-tree-node-loading .x-tree-node-icon{