You're misunderstanding the issue. The issue is that the placeholder text disappears once you start typing into it. The usability assumption is that once you

You're misunderstanding the issue. The issue is that the placeholder text disappears once you start typing into it. The usability assumption is that once you start typing in a value you no longer need the placeholder, but that is a bad assumption, particularly if a mistake is made as the gp is alluding to.