--- dix/window.c	2006/05/21 04:31:27	1.1
+++ dix/window.c	2006/05/21 04:33:59
@@ -2686,6 +2686,7 @@ MapWindow(register WindowPtr pWin, Clien
      */
     if ( (client->trustLevel != XSecurityClientTrusted) &&
 	 (pWin->drawable.class == InputOnly) &&
+	 pWin->parent && pWin->parent->parent &&
 	 (wClient(pWin->parent)->trustLevel == XSecurityClientTrusted) )
 	 return Success;
 #endif