Title attribute usage
Jesse Ruderman apparently (random.foo) doesn't like hidden meta-data in anchor tags. He's even developed a bookmarklet to dig 'em up and make them visible. He probably uses it on dive into mark too (hat tip to Mark for such nice comments today!).
As a side note, I think Jesse makes a good point-- perhaps there is some title attribute abuse going on. And what does Mark think of title attributes? Thumbs up, but all things in moderation.