We're big fans of using 'nofollow' for linkjuice sculpting around your site. If you know what you're doing, you're careful, and you're considerate, it's an incredibly powerful strategy that can have a big payoff. But what if you make a mistake? If you don't pay attention, or you go about it willy-nilly, site-sculpting with 'nofollow' can cause some major problems...and that's what we're looking at in this week's Whiteboard Friday.