Are you posting these issues in Ubuntu forums and it's bug reporting system?
I have Ubuntu 10.10 with all the updates. I also have the latest version of the Adobe Flash plug-in. Videos at the news sites will not play. BBC News says I "don't have the correct version," but I do. It's installed. FOX News just gives me a black triangle.
There are a couple of other non-working quirks, which work fine in my XP system, but I'll start with these. Any help will be much appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic