I've no experience evaluating photos like this, but it just looks odd to me.
I think what bothers me is that shadow is so straight. Wouldn't you expect it to be more curved? Also, when you look at the wall, I see something that looks like a barren rocky surface with a small impact crater. The pictures just look faked to me. After seeing these pictures of Martian "water" ( http://space.newscientist.com/article/dn12026-mars-rover-finds-puddles-on-the-planets-surface.html) and comparing them to the center part of the Burns Cliff Panorama ( http://us.st11.yimg.com/us.st.yimg.com/I/skyimage_1962_13285574) taken by the rover Oppertunity, I think some people are using too much imagination and image processing for their own good. George
