I happened to mention to one of my local postal employees that most of our Canadian subscribers didn't seem to receive the Summer issue of the magazine. Her first reaction was that the printer probably does not include the country on the mailing labels. If Canada is not on the label, it will not be delivered! I have been talking to printers, mailing houses, and others for advice. The printer and the mailing house have been conducting their own unsuccessful investigations. Yet an off-the-cuff comment to a postal employee may have solved our problem!
Regardless, I will continue to have the international subscriptions mailed by hand until we have a guaranteed solution.