Comment 14 for bug 225379

http://forums.mozillazine.org/viewtopic.php?p=3358066#3358066

He explicitly confirms that it does not happen with FF2.
I could not find an open webcam with that problem. Most of them where the people have problems with are private ones.

It seems to work with the open ones i could find. With all of them i can see a "Connection: close" in the sent headers.