I have the most current version of Flash but have lost internet sounds. The media player on my computer works but I have lost sound on all browsers. How do I fix it?
If you are on Windows Vista or Windows 7, I'd recommend taking a look at your Volume Mixer and verifying that you don't have your browser muted.
I forgot to mention, you should also try and play non flash related content in the browser to see if audio works. If the HTML5 video link fails to play sound, then this is not Flash specific.