Hi,
I just noticed that if I have foobar2000 playing in the background through kernel streaming plugin that the Flash videos won't have sound output by playing through FireFox 3.0 - by stopping playback sound output starts working and then I can even restart the output and I then get both sound outputs.
Futhermore, I tried to playback a Windows Media File (through the WMP Plugin) and that one didn't want to start at all (just doesn't start buffering - it keeps displaying "Ready"), only after stopping playback in foobar2000 and then reloading the page it worked.
Quicktime seems to work fine even with Kernel Streaming plugin.
That problem doesn't seem to occur with Direct Sound or ASIO plugin (that is why I am currently using ASIO plugin now but it still would be nice if Kernel Streaming wouldn't have this problem either).
I am using FireFox 3.0 btw.