CREO assembly drawing x-hatching problem with save-as PDF

We've been having a problem lately with assembly drawing x-hatching not looking correct after save-as to PDF.  This seems to have happened since maybe CREO 9, possibly earlier.  But it seems to get worse with each release.  It starts out with an assembly drawing with x-hatching.  It looks fine.  But when we save-as to PDF, the x-hatching looks messed up.  I have attached some screen shots of the PDF showing x-hatching not looking correct.  This is not the only drawing it happens on.  It happens   Currently using CREO 10.  

Thanks in advance.