Every time I go to a PDF link in Safari on my iMac I just get a blank, gray screen. At first I thought that they were big PDF files that needed to download, but nope, it's just a blank screen without the document ever showing up. If I view it in a different browser, the document comes up just fine, and if I save it as a file to view with Viewer, it's fine. But I want to read PDF files in Safari itself. Is that no longer an option?