Has Acrobat changed at all? I think FileMaker Pro will use some libraries to create the PDF. Check for Adobe updates, maybe a re-install is in order.
Works fine for me. 12.0 v4 and 10.8.4 here.
Thanks a lot David.
I already tried your suggestion but the problem is still there. I´ll try reinstalling FMP and see.
Make sure you remove adobe first (not just an update) then reinstall it and see if that works
Best of Luck