diff --git a/UPDATING b/UPDATING
index a26ac7b41676..4fa199756e2f 100644
--- a/UPDATING
+++ b/UPDATING
@@ -38,12 +38,21 @@ ITEMS:'
 	will attempt to produce a new nsswitch.conf file for you if you
 	don't have one, and you have host.conf.
 
+20000905:
+	The ucred structure changed size.  This breaks the interface
+	that mountd uses.  Trying to use an older mountd with a newer
+	kernel guarantees a panic.  This means that you need to use
+	kernels newer than today only with matching mountd, but you
+	needed to do that anyway with the boot loader changes.
+
 20000905:
 	The boot loader has been updated.  The new default kernel is
 	now /boot/kernel/kernel.ko.  The new default module location
 	is /boot/kernel.
 
 	You *MUST* upgrade your boot loader and kernel at the same time.
+	The easiest way to do this is to do the buildworld/buildkernel/
+	installkernel/installworld dance.
 
 	Furthermore, you are urged to delete your old /modules directory
 	before booting the new kernel, since kldload will find stale