Current ISO (archlinux-2013.07.01-dual.iso), not readable after dd

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https://bbs.archlinux.org – Hi, I've got an old MacBook I'm trying to duel boot Arch with.The other day I downloaded the last ISO (archlinux-2013.06.01-dual.iso), and `dd` the ISO onto my memory stick.Was readable, everything was fine; it mounted, recognised it as a valid disk.I hadn't got round to installing it yet, and I noticed a new version "major" was out; I have slow internet where I am at the moment, so I thought it would be better and quicker to torrent the latest version and install it, rather then using the old one and updating.After torrenting, I formatted my stick. and proceeded with (HowTos)