It's not a LimeSurvey problem, but rather a PDF printing problem.
First Google results for "pdf character printing":
answers.acrobatusers.com/When-I-print-Ad...-document-q1929.aspx
acrobatusers.com/forum/printing-prepress...-garbage-characters/
First Google results for "pdf character printing":
answers.acrobatusers.com/When-I-print-Ad...-document-q1929.aspx
acrobatusers.com/forum/printing-prepress...-garbage-characters/
Yes, I mentioned that printing "as image" works.
. I opened the PDF document, checked in File, Properties, Font and figured out which font the document was created/updated with and then downloaded that font to my computer.