Hi Frank
I am running Bianca and they come up in Mplayer
in Firefox with me, the Real Streams, the Windows Media, the Flash, and the Quicktime
They did not when I first installed, because The video and audio was not set in Mplayer
Click on a stream, if Mplayer plugin shows right click on Mplayer screen, choose
Configure, and then set Video and Audio, in may case its X11 and Alsa
Hope it works
Let me know how you get on
Nick