Every once in awhile I download a pdf that looks fine on screen but when printed the inter-character spacing is all messed up. See image below.
By fine on screen I mean in any browser's embedded pdf viewer, or in Adobe Reader, or in Foxit Reader.
And for printing I use Adobe Reader or Foxit Reader (this particular example was Foxit Reader but I'm nearly 98% sure I've seen it with Adobe Reader too.)
My current printer is a Lexmark C2425 with proper Windows 10 drivers installed. (Though it has happened with other printers, e.g., Brother, and Pixma, too.)
So, what's up and how do I troubleshoot it and fix it? I suspect a font issue of some kind - though the pdfs this happens to are all academic papers which are nearly always produced by some LaTeX system using standard templates so I'm not confident it's a font issue.
(To be clear: 99.9% of all PDFs downloaded from whatever source look fine on the screen and print absolutely A-OK. (But of course the one out of a thousand that is broken is the one I really want to read...)
(Please ignore the fact that I took a lousy photo with shadows of my fingers ... thank you ...)