WebGL - Can't open with Opera

For some reason My Opera browser fails to open my HTML WebGL coded pages.
It fails at the beginning to get the WebGL context.

I have a tried it with the newest version and with a previous version that should have supported it with no success.
It works fine with Chrome and Firefox.

I have the DirectX runtime driver already installed and my Graphics card is up-to-date.

What could be the problem?