Since some days ago I have no sound if I play clips from YouTube.
Also when I play one of my own flash clips: no sound.
Playing video with windows media player or real player: no problems with sound. I checked the windows sound mixer: all set OK.
I deleted the flash player and installed the latest one again.
Still no sound. When I put the volume of my amplifier on maximum I hear the YouTube sound on a very, very low level.
The volume of the player is set to max and the sound knob in the correct position.
I have the exact same symptoms PLUS the "Welcome to AOL" and "You've got mail" are muted too, while multimedia play perfectly offline. Perhaps I did something to turn off the dreaded AOL voices but can't remember what.
Sorry this won't help you Phocas, but it might trigger a response for both of us.