Re: pixels
If you go to APD below, then click on Mr. Trujillo's site, he gives a nice explanation of the moving and not moving pixels. I found at least five that seem round, 'far way', move in the same direction and appear in all the frames.. as does Quaoar Phew, something tells me that the days of simple planet names as Pluto and Scooby Doo -the stones on Mars in general, will never be the same. :)
http://antwrp.gsfc.nasa.gov/apod/ap021009.html