Silvery - 10:02 pm on Oct 27, 2009 (gmt 0)

Yeah, I know - the link might call itself a "404 handler" resource, but if you look at the actual server header returned, it's a 410. (I mistyped "401" earlier, as though I were dyslexic, when I'm not.)

Your visitor must've clicked on a link to your site from Yahoo's "related search results" they're showing on those pages.