I have no idea what to make of the above picture. You can tell that it is situated upright because of the shadows cast from the object. I almost get the impression of a bunny.
This one is equally strange, but maybe these are just debris from some part of the landing apparatus.
There are several of these white objects scattered around. These could just be pieces of the airbags.
If you want to see them for yourself, just look to the bottom, right side of the panorama.
The entry for the panorama is toward the bottom of the page at "02-Feb-2004."