Robert_Charlton - 5:59 am on Feb 25, 2013 (gmt 0)

ichthyous - I took a look at an earlier post of yours in a discussion where you talk about Pinterest links providing exposure for your images, and, if this is the same site you were discussing then, I'd venture to guess you've got a very weak backlink profile and content that's not compelling enough to build one....

Are too many links from Pinterest bad for your rankings?
http://www.webmasterworld.com/google/4510352.htm [webmasterworld.com]

In part, you posted...

...At least Pinterest is driving them up in the rankings and I have each image watermarked with my site's URL so they can always find me. I do wonder if pinning too many images too quickly can create problems though...I started pinning my own images and whammo my site has been hit hard by the last update. Not sure if there is any correlation though.

Again, if this is the same site, you may well have seen the problem coming and answered your own question months ago.