1script - 4:08 am on Jan 25, 2013 (gmt 0)
hipotecamix, I personally think that Google Images is a sham and has been for awhile given the way they render the landing page underneath the image that's taken completely out of context. They use resources of my site for showing my images and yet nothing good for me can ever come out of that "visit" because the site is effectively disabled underneath the image - user experience metrics for such visits should be horrible and nothing ever converts - people hit the "Back" button right away.
With that said though, I don't see how the particular drop on 11/16 (or 11/17) 2012 can only be attributed to changes in Images - as I said before, my site that dropped most that day has almost no images whatsoever. In other words, if you are only digging around Images to understand what has happened that day, you may be missing the point. I don't know what that point is, but it's not (or not only) images.
By the way, given that this thread is couple months old now, did you see any improvements yet? I have not.