--- ./Src/xutils.c.00	1999-03-27 07:46:38.000000000 +0100
+++ ./Src/xutils.c	2007-02-20 08:09:47.000000000 +0100
@@ -251,7 +251,7 @@
      */
     XSetWMNormalHints(display, win, &mysizehints);
     classHint.res_name = wname;
-    classHint.res_class = wname;
+    classHint.res_class = "DockApp";
     XSetClassHint(display, win, &classHint);