I have received word that Yahoo! Music, nee Launch, is going to start looking into the problems they have playing on Firefox. I cannot tell you how long it's going to take to fix the issues, but at least you can rest easy about it getting addressed.
Speaking of Firefox, has anyone seen good stats on it's market penetration? Does Google publish stuff like this, or Amazon? The stats from tech sites are not to be trusted; too many early adopters and too many Microsoft-haters skew the numbers.