--- xfce4-taskmanager-0.4.1/xfce4-taskmanager.desktop.in~	2008-06-14 22:02:46.000000000 +0200
+++ xfce4-taskmanager-0.4.1/xfce4-taskmanager.desktop.in	2010-05-11 12:44:39.428487335 +0200
@@ -8,4 +8,5 @@
 Terminal=false
 StartupNotify=true
 Type=Application
-Categories=System;Utility;
+Categories=X-XFCE;System;
+OnlyShowIn=XFCE;