Lately, whenever I click on a file (be it PDF, XLS or whatever), it doesn't open. Instead, I see the relevant app (Acrobat, Excel, or whatever) flashing on the taskbar and I have to click on it to view the downloaded files. Not a big deal, but it used to be different, with the relevant app opening a window with the downloaded files (which makes sense: if I click on it to open - and not download - I want to see it now). Does this happen to you as well? I could not find any option to control this behaviour, and I don't think it is intentional.