I am encountering the same issue. Everything was working beautifully until I upgraded. After upgrading, I began receiving a message “The file https://xxxxx.cloudfront.net/xxxs.mp3 doesn’t exist; check the URL.” But it streams just fine. As dianeb suggests clicking on Use “default browser download capabilities” is a partial solution. But, when I downgraded to 1.8.6 & everything went back to being fine.
Is there a solution?