Stackoverflow was one of the biggest offenders to me. They would state that something was a duplicate of something else, with no link to the other thing. Except there was a link. I just couldn't find it without 'view source.'

I must confess I've been guilty of it too. I 'invented' a style of link whereby the link has a border on all four sides and is filled with a transparent pastel. I've even seen this around some (apparently it is kind of an obvious idea). But all in all, I've gotten away from trying to invent my own UI.