Just started playing with the 'Yahoo Web Player'. My problem is different - the player can't start. The player and/or Firefox 4.0.1 get stuck in a 'buffering' mode. Pop-out, pop-in, and playlist work ok. I see the same problem on the [http://webplayer.yahoo.com/] web page. I click on a song, and see the pop-out, with the 'buffering' display. But, if I right-click and open in 'new tab' or 'new window', the player works. Haven't yet updated to Firefox 8.