Follow-up! Based on a recommendation made earier in this thread, I called Kent at Parago. He was very pleasant. I had taped the s/n cut from the box to the rebate form. When they removed it, the tape must have torn away the bar code. He had me fax him my photocopy of rebate form with s/n taped to it, that I had made before mailing. All is good now, my faith (and $100 rebate)has been restored!