Recently I have been creating a PDF for announcements which allows me to add images to announcements. After upgrading to 2.4.1, I am no longer able to import a PDF into the Presentation manager. Title comes in with a red X to the left of it. Previous PDF which i had imported with 2.4.0 are still there and work normally. I am using a Mac with OS X 10.11.5. I tried creating the PDF with several different software programs, but got the same results. I have tried checking and unchecking the "Allow presentation application to be overridden:" but that makes no difference. Any ideas?