My poor mother… Her hard drive melted down on her MacBook and the apple store replaced it, backing up her /Users /Applications and /Library on an external HD. I’ve restored those folders (backing up the new ones and using sudo cp -r since I’ve lost the I’d disk and couldn’t get the system copied over to boot off the external). Everything was going well until I replaced the /Library folder… Now she can’t run software update and trying to install iTunes 7 gives her an error.

Any thoughts? Permissions, maybe?