How to remove button outline in Opera on focus

Question

Does anybody know how to remove the dotted outline on buttons in Opera?

Answer 1

I say this with the clear proviso that you shouldn't remove the outline unless you replace it with something else that indicates focus state ...

If you apply a transform to the element, it kills the outline in opera; it doesn't even need to do a visible transform, merely applying the property is enough. So this will do the job:

#myButton:focus
{
    -o-transform:rotate(0);
}

But I can't promise that wouldn't be considered a rendering bug, and consequently something that may change in the future.