When Leopard first came out I tried to upgrade Tiger to Leopard and it clobbered my Dual 1.25 G4's boot disk. I reinstalled Tiger and a second HD, and basically brought over docs by hand. Tonight I CC cloned the working boot drive to a third drive. I tried updated the second HD and it go clobbered. (I still have a clone that boots) Now I'm installing a total reformated drive with Leopard, and I want to use Migration Manager to pull in everything from the bootable Tiger Drive. Is this going to work? Is migration manager going to bring over any corrupt system files or does it just go for user accounts and data?