Thanks: I did start hearing "you have a reply" from some tab, and figured it had to be that.

>>just curious: what is the use of the Windows media that the UT wanted to install (and I allowed to be installed) today?
>>
>>I haven't heard any music playing or seen any videos of you on the tennis court. <s>
>
>This support was added overnight and applies to non IE browsers. It is to support the sound notification whenever there is a new reply, a new message in the agent or a new private message. This is based on your profile configuration. The default is to have that enabled.
>
>If you have received this notification from the browser, it probably means that this was never installed before. This is usually installed on pretty much all browsers now.