This is REALLY getting frustrating. For about the past 6 months or so whenever I try and play a concert it hangs after about 45 seconds 80% of the time. I'm using Firefox 3, no "corporate firewall", on Windoze XP with a very high speed DSL connection. This is a very common configuration so there shouldn't be a problem like this - I can only surmize that Wolfgang's Vault doesn't have adequate bandwidth, because I do.