Look what I just found
:
I browsed through the hi res MARDI descent images and found the actual impact of the heat shield in this image:
http://mars.jpl.nasa.gov/msl-raw-images/msss/00000/mrdi/0000MD9999000358E1_DXXX.jpg
It's the little back irregular spot in the middle near the bottom edge. It's not in the image before that!
It fits perfectly with the 'crime scene' photo released earlier:
http://spectrum.ieee.org/img/curiosity%20rover%20crime%20scene%2 0landing%20site-1344365185223.jpg
Cheers,
Rolf