I have 4 of her and at least one has the spot as I recall. I don't remember if I cleaned it up or not but a lot of G3's have factory glue on their bodies. I cleaned up quite a few a month ago as I was getting ready for the WI pony meet. I think since its in the same spot its safe to say that some part of the aparatus handling Starcatcher as she went down the line must have gotten glue on it.