My new Macbook Pro 15" has stopped loading flash content. (it played it just fine about 2 days ago) I can get onto Youtube etc, but the videos themselves get stuck on the circular dots loading image. I figured it might be a problem with one of my Firefox add-ons, so I disabled them all, to no avail. Then I tried Safari, and it won't work in safari either, or chrome or opera. I tried installing Flash player, but when I click the download link, nothing happens. I tried multiple mirrors, but none of the links download anything. I'm at my wits end. Please help!