I found a radially (across the tread) oriented split or tear about 1/16th deep that appears on both sides of my rear tire about 2 inches from one of the molding seams. Two techs at the dealer say not to worry about it but I must admit that's difficult at times (you know those times). Has anyone else seen anything similar? It hasn't changed since I notced it but I'm worried about a hidden flaw. Thanks, Bill.