This photo from Spirit, taken on Sol 666, (ominous number, but I'll let the woo woo's deal with that). If I'm correct, we are looking down slope from Husband hill, in the general direction of Home Plate. In the center of the image, just above the bottom of the picture, is a small, fresh looking crater of some kind.
It doesn't really look like an impact crater to me. Is there a possibility that it could be the result of out gassing?