I just saw the neatest set of pictures on this YouTube video and thought the members would enjoy seeing it.
I double checked and sure enough the orb is there starting on the third photo and it does move.
http://mars.jpl.nasa.gov/msl/multimedia/raw/?s=527&camera=FHAZ_
https://www.youtube.com/watch?v=X-4YwUGPBlM
It's at the beginning so you don't have to watch the whole thing but it is a pretty good video.