For a while now, perhaps since I upgraded Firefox to 18.104.22.168, I've been unable to read .pdf files from internet sites. When I click on any .pdf link the progress bar flashes and it almost immediately says "Done" and a new Firefox screen comes up completely empty.
I've got Adobe Reader 7 on my PC, and I get the same blank result if I manually start it running in background before I try the .pdf pages.
I've searched on my PC for the .pdf files in case they've been downloaded but not opened, but I can't find them. Is there a setting which would cause this?
I'm using Win XP SP2 and running ZA and AVG, both of them updated regularly.