i have windows vista.. and for some reason i dont hear any sound from youtube, imeem, myspace and other sites, but then i hear sounds from itunes, limewire, windows media player, zshare... i checked a couple times, and nothing is on mute.. if it is my sound card, then i shouldnt be able to hear sound from everything... ive been trying to figure out if it IS on mute.. but everytime i check..nothing..