A CHILD WAS SITTING IN THE FRONT PASSENGER'S SEAT. WHEN THE SEAT WAS PUSHED BACK, ABOUT 3 INCHES, THAT THE SEAT SLID BACK AND FORTH ON THE RAILING. THE SHARP EDGE OF THE RAILING, CUT THE CHILD'S ANKLE. DEALER CONTACTED AND SAID THAT SHARP EDGE SHOULD BE COVERED WITH DUCT TAPE. MANUFACTURER CONTACTED AND WAS NOT AWARE OF THE PROBLEM.AK