Both the Silk browser and my (sideloaded) Dolphin browser are having the same problem with web page links to simple MP3 files. Flash audios play fine, but a straight link to an MP3 file doesn't — won't play it, nor can I download it using tap and hold. Copying the link URL and pasting it into a new web page reports a 404 Page Not Found error. I've verified the links are valid and functioning normally using my computer, iPad, and Transformer. Looks like a limitation in the Fire. Anyone else seen this? Any suggestions?