lucy24 - 8:24 pm on Feb 3, 2012 (gmt 0)
But nine 400s in eight seconds is not someone clicking through images to pick a corresponding graphic.
But it doesn't work that way does it? My impression was that the Facebookexternalhotlink robot presents the user with all the images at once, and they make their selection from this already-downloaded batch. Later on you start getting the recurring hotlinks, but only for the (un)lucky one image.
Would a 400 normally be served before or after a 403 if a request qualifies for both? I think mine just come through as 404.
Incidentally I hope there are not too many humans with "Darwin" in their UA because I recently got exasperated and blocked it.