mailing labels show incorrect non-Latin characters

from contacts search results select 'action' as 'mailing labels' and click 'go'
when contact name or address has accents (like 'Ćagać') or is written in Cyrillic the resulting PDF will have question marks for characters with accents (or in Cyrillic).

ps: just as a x-check: when exporting contacts to CSV the characters are displayed right.