root-on-ZFS - gptzfsboot fails to find pool

[Warren Block]

On Wed, 20 Aug 2014, Elliot Robinson wrote:

> G'day all,
> A fresh root-on-ZFS install using bsdinstall's ZFS option on FreeBSD 10
> fails to boot on my Dell Studio XPS 1640. Output at boot is
>
> gptzfsboot: error 1 lba 48
> gptzfsboot: error 1 lba 1
> gptzfsboot: No ZFS pools located, can't boot

This has come up in a few places lately.  Could it be due to upgrading 
the pool but not updating the bootcode?