Problem

When printing a PDF that is created with pdf.pltcfg from Adobe Reader random lines and shapes are printed. This issue appears to be related to specific postscript drivers. Typically the problem cannot be reproduced using a PCL or other non-postscript Windows drivers. Problem can be unpredictable.
 

Solution

Try setting the following Microstation variable:
MS_PLT_ENABLE_OLE_TRANSPARENT_BACKGROUND = 0