On one computer, if we preview or print an .IDW on letter size paper, it's fine. If we preview or print on 11x17, the shaded areas of the drawing appear in solid black. This happens with two different printers: HP LaserJet 9000 with postscript driver or HP LaserJet 5000 with PCL6 driver. Weird thing is, another user can plot to the same printers with no problems. Both are running Inventor 11. The problem PC has a Quadro4 380XGL, driver version 8.1.9.8. Both run Windows XP SP2