I have seen a lot of people talking about problems when viewing the new Macromedia.com website Beta within the Opera browser.
We are aware of the issues and are working with Opera to resolve it.
Btw, this is one of the reasons the new site is a “Beta”. We are still working out some of the kinks. If you find any problems, or have any feedback, make sure to log it on the Macromedia.com feedback form.