Since we switched to AutoCAD 2010 we have been having trouble with things disappearing when we plot to PDF. I can not find a pattern with the things that are missing (i.e., area on page, layer, linetype, etc.). When I do a plot preview everything appears the way it should and then after the PDF is made items are missing. Typically after a couple of trys of rePDFing the drawing everything appears and works fine. Does anyone have a solution for this? I am using Vanilla AutoCAD 2010 and Adobe Acrobat 9 Pro. Thank you.