Hello,
I am not sure if this post belongs here or in Acrobat. I noticed that if I print to PDF from Illustrator, some characters with ligatures behave strangely. Although everything looks fine on PDF, if I select some text with ligatures and paste it into a word processor document, the pasted text is incorrect. For example, "off" becomes "offff". If I go back to Illustrator and remove the ligature from the characters in "off", then copy and paste the resulting text in PDF, it yields the expected result in the word processor document: "off".
Is this a known issue? There are some threads discussing ligatures and exporting from InDesign to PDF. I am not exporting but printing to PDF from Illustrator.