Under Phoenix ( reprocessed ):

This is a revisit under the lander.
The images were processed with a square root brightness adjustment followed by a contrast change followed by a rotation followed by a 2x scaling.
The bright, holey rock under the lander may be ice -- according to Mission Scientist Dr. Ray Arvidson during the Press conference today!
Yes, dx, it looks like the round rock might have "popped out" of the hole in the rock and "bounced" twice! Very strange.
I wonder if the exhaust from the rockets was hot enough to boil ice trapped beheath the rock and then the trapped hot water vapor popped the rock out like a cannon?!
Followup RAC images are scheduled for tosol of the sane area. IF it's ice, then there may be changes in the "rock".
Mo mention was made of the "screw" or conical rock.
These images were created with the 8 bit lossy JPG which is mostly "clipped" in the dark shadow -- so maybe the NASA guys already know it's "just rocks".
I will opst the new images as soon as they are available.