I have just installed Ubuntu 11.10 on my computer, and recently applied all the latest updates. As invariably happens when I do this, YouTube videos have stopped working in Mozilla Firefox. Displaying their web page shows a black box where the video should be.
The version of Mozilla I am running is 10.0.2. Does anyone know how to get these things to work. I have consulted the answer to my previous question on the subject here but to no avail.
Does anyone know how to get these things working again?