The update worked perfect for me, twice. I ran it while booted from mmc2, rebooted to flash because the boot menu was gone, ran the update in flash, reflashed the boot menu (thanks fanoush), and booted to the cloned OS on mmc2. Two successful updates with no problems at all.

I did have the rtcom-beta-os2008 installation problem, but fixed that by adding the Callabora diablo catalogue (thanks qwerty12).