> This sounds like a reserved port issue.  I forget exactly when it went in,
> but the mountd semantics were changed to by default deny mounts from
> clients NOT using a privileged port.  Earlier NetBSD did just that.  Try
> adding the option -noresvport to your /etc/exports on the 1.3 machine.
> that should allow the 1.2.1 machine to mount.  Once it is upgraded, you
> will no longer need that.

	Yup, that did it. Thank you!

-e

(I was hoping that it was somthing that would not affect the NFS mount to 
copy the miniroot, but I didn't want to rely on it, since once I write 
SYS_INST on to that boot block I can't turn back.)