17.5.1 and 17.5.2 scrambled/garbled fonts - PDF/Prints

Last couple of releases (17.5.1 or 17.5.2) have created a nasty bug for Autodesk Revit and printing or creating PDF's.  It scrambles system fonts - I'm using Arial and here are some comparison screen grabs.  I've reinstalled both PDF & CAD/BIM software from scratch, then wiped my entire bootcamp windows install and started over with a fresh install of everything.  Tried different scaling for text and different resolutions for the monitor - no luck.  Support from both the PDF printer software and Autodesk both point to graphics drivers (and I found one post where someone switched a graphics card in a windows box from AMD to Nvidia and the problem went away).

Any suggestions on correctly displaying fonts when printing in windows?