I have twice downloaded the amdx64 version of Kali 1.0.3 directly from the website. The SHA1 value has been the same both times, and has not matched the one presented at the download screen. It seems highly unlikely that this is random coincidence, so I am currently redownloading the iso via IE rather than Chrome to see if this corrects the issue. If it does not, I will try the torrent version. In any case, I just wanted to put this out there that there is a potential problem with direct downloads that goes beyond random error.