LOL, Vicki and Rivka! I don't forget faces (I'm a very visual learner), but I'm that way with names. I've been known to remember questions that students asked in class, essays they wrote, grades I gave them, even something personal they told me about their children, but there's a black hole where their name should be. <sigh> I just smile and say hi when they greet me by name.
Apparently, this issue of Clark not being recognized is only a problem for me, CC, so you can give what weight you want to it.