The face doesn't seem as happy as it used to be...
Here are some earlier examples:
http://antwrp.gsfc.nasa.gov/apod/ap990315.html
http://barsoom.msss.com/education/happy_face/happy_face.html
My suggestion:
In the event that Galle may actually be depressed, we should launch a mission to
drop a whole bunch of prozac into it, in a gesture of interplanetary good will.
