Thanks, how did I miss that? Too many late nights!
Now Mac, this is a SCORE! Great find. I highlighted something else from your image, the upper right hand corner. How could they miss this???
The whole universe is to the observable universe, as the observable universe is to an atom. - Alan Guth
http://mars.jpl.nasa.gov/msl-raw-images/msss/01528/mcam/1528ML0077850050604416E01_DXXX.jpg
Looks like they tried to white out a skull of some type and maybe a little grey guy on the side.