404 from Facebook?

I love your plugin – it works great, very accurate I think and is so easy to use.

But I notice in my 404 logs, that the Facebook button is generating an error, over and over again:

http://www.emptymirrorbooks.com/www.facebook.com/plugins/like.php?href=http%3A%2F%2Fwww.emptymirrorbooks.com%2Fabout-us&send=false&layout=button_count&width=80&show_faces=false&action=like&colorscheme=light&height=27&locale=en_US

Any way to resolve this?

Thanks so much.
best,
Denise

http://wordpress.org/extend/plugins/really-simple-facebook-twitter-share-buttons/