(DIFFERENT) Google Contacts and Facebook Pics

First off, let me say that I've read though the other facebook sync threads, and this does not appear to be the same problem.

I don't know how this happened, but somehow facebook added profile pics for all my google contacts that did not have a pic. All these pictures even appear on my google contacts page online, not just on my Hero. They also have not updated in a while. I don't think I've touched my facebook settings either. My contacts just randomly all had pics one day a few weeks ago (without the facebook icon, btw). Does anyone know how this happened?