Addendum: no other poppler-based PDF viewer nor Adobe Reader installed to test; Apple's Preview.app reports the same error as mentioned in bug #672686 comment #4 when opening the PDF, but renders it as expected.
Preview.app console messages: Notice encountered unexpected object type: 7. Notice missing or invalid object number. -- Opaque radial gradients cause PDFs to fail to open in Adobe Reader https://bugs.launchpad.net/bugs/681512 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs