Look at those large dome-like things on the mountain tops. It is odd that a giant boulder could sit that long up there without rolling down. Then again, in low gravity all kinds of things might seem out of place. For example, the "Yogi" rock in 1997 was balancing on its edge, the rover found it when it went to the other side of it.

There is also a "gleam" on the mountain side it looks like. Other images have also shown such gleams, so they are probably crystals reflecting sun or something. (I suppose they could be camera artifics, such as radiation hits or others kinds of noise.)

200K image:

[link|http://marsrovers.jpl.nasa.gov/gallery/all/2/p/132/2P138079813EFF5200P2438R1M1.JPG|http://marsrovers.jp...5200P2438R1M1.JPG]