This is not new, I'm just tired of it.
I cannot seem to watch You Tube movies using Firefox 3.5.18,
it works fine when I try to watch the same movie using Seamonkey 2.0.11.
When I go to a link using, Firefox, I see:
"Undefined's Channel, Subscribe, and Uploads" below the movie, I see:
"Warning: this video is not set to use HTML5. If you have not, go to
http://www.youtube.com/html5 and join the beta."
I've joined the beta, and still see this.
This is Mint Linux 10, 64-bit, and not an issue on my laptop, Mint Linux 9, 32-bit.
Could Firefox simply need updating?