I started the install of 13.04 and chose the upgrade. I was thinking it might not change the grub or boot partition. but here is what I got:
Error when upgrading.png
I chose the "continue" then got a message
I continued anyway hopeing that the install would complet and not touch the boot partition or the grub.The attempt to mount a file system with type vfat in scsi(0,0,0), partition (sda) at /boot/ efi failed.
It is deleting file that are not needed in 13.04 right now and I am waiting for the install to finish.