Bug still exists with this file using Tex Gyre Heros (it's a substitute of Helvetica) under same system (Ubuntu 14.04 clean install with texlive-full and fully updated). You can see it in the word "classification" in the whole PDF.
** Attachment added: "rfa1415_15sep_lect1.pdf" https://bugs.launchpad.net/ubuntu/+source/tex-gyre/+bug/1317599/+attachment/4213588/+files/rfa1415_15sep_lect1.pdf -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1317599 Title: Evince doesn't show "fi"-ligatures in a pdf file To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tex-gyre/+bug/1317599/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs