hspace is an older attibute not supported in XHTML:
I also see this in WelcomeBox.aspx, for imgGlass. It would be wise to factor that out. But most of us will use our own custom WelcomeBox, anyway.
By the way, anytime the code download doesn't agree with the book, you should understand that the code download is newer and it may have fixes or enhancements that don't show up in the text. It's easy to update a zip file, but harder to update a physical book :-)