Pablo, My general advice to my clients is to never rely on JAWS and any browser plug-in or extension related to reading PDF files to "play well" together. I've seen, time and again, PDF documents that are 100% accessible when JAWS and Adobe Reader are being used to access them but that just give really crazy results when a browser plug-in is involved.
Were I you I'd download said PDF files and open them with Adobe Reader then see what JAWS has to say. It may still not work as you'd expect, but I'm willing to bet the result will be different than it is when the file is opened within a web browser, any web browser. Brian
