diff -ru linuxwacom.orig/src/xdrv/wcmConfig.c linuxwacom/src/xdrv/wcmConfig.c
--- linuxwacom.orig/src/xdrv/wcmConfig.c	2009-01-25 13:09:46.000000000 +0100
+++ linuxwacom/src/xdrv/wcmConfig.c	2009-01-25 16:07:26.000000000 +0100
@@ -387,6 +387,7 @@
 		xfree(priv->pPressCurve);
     
 	xfree(priv);
+	local->private = NULL;
 	xf86DeleteInput(local, 0);    
 }