Right, I knew I hadn't quite got all the way. The partman-efi changes for "mkdosfs -s 1" (now that I've understood why that's needed) are on their way in now, and I'll start looking into what's wrong with GRUB.
Right, I knew I hadn't quite got all the way. The partman-efi changes for "mkdosfs -s 1" (now that I've understood why that's needed) are on their way in now, and I'll start looking into what's wrong with GRUB.