I am sure someone can answer this rather quickly.  I have been using solidworks for some time now and never have I ever, until today seen a mate in my assembly with a Star.  I am almost positive it has to do with autosized parts from the toolbox because today is the first time I actually used that feature and the star's are only located on mates having to do with the autosized part.  I see no ill effect from the star, and don't think is a warning like when it over defined.  My coworker has also never seen this and we are both interested in finding out if it's good, bad, or irrelevant.  Below is a partial screen shot incase anyone is confused by what I am asking.