LaserWriter 8500: Using 13- by 18-Inch Paper

When I print on 13- by 18-inch paper that is loaded into my optional 500 sheet A3 cassette tray, the printed image shifts down approximately 14mm. When this occurs the bottom of my printed page is clipped off. Why does this occur and how can I correct it?
Until more information is available there are two effective workarounds:
Published Date: Feb 18, 2012