Need Help! Whenever I send a plot to my DesignJet 650C the lines on the drawing are not always straight. Occasionaly the plotter cartridge will be misaligned as it makes a pass on the drawing. This will cause the lines on the drawing to not be straight. Is there a known problems with updating to AutoCad Mechanical 2005 from Autocad 2000i? We did not have this problem until the upgrade. Please help.