HAD CHILD IN CHILD SEAT IN REAR OF VEHICLE, 1996, FORD EXPLORER. ANOTHER VEHICLE HIT CONSUMER'S VEHICLE ON DRIVER'S SIDE REAR WHILE IT WAS WAITING AT STOP SIGN; CONSUMER REMAINED IN VEHICLE UNTIL POLICE ARRIVED. DRIVER TRIED TO EXTRACT CHILD SEAT CARRIER FROM BASE, WHICH FAILED TO RELEASE. ENTIRE CHILD SEAT WAS REMOVED. NO INJURIES TO DRIVER/CHILD. THIS WAS THE SECOND CHILD SEAT THAT FAILED TO RELEASE CARRIER FROM BASE. MANUFACTURER HAD REPLACED ORIGINAL SEAT.*AK