wow, bystander, you sure are fast! After perusing all the pictures i could find from your links, it would seem as though the collapsed side happened before the first picture was taken. It may be a little worse in the later pictures, but its really too hard to tell.
If the light had not been just right when the first picture was taken it would not have drawn so much attention.
There are at least a couple of other interesting items there, like two really shallow craters with something sitting in them that are just slightly smaller than the crater itself. It would seem as though those two objects came in and hit the surface very slowly and "stuck" there, or, they were put there on purpose.
Well....we may never know that for sure either.
It's almost like having too many holes and no donuts
