A Opera 10.50 we have been following closely for some time, especially since, with the improvements included, is becoming one of the best browsers available. Not only is it pretty fast, but both the renewed interface, like all the added features to complement the navigation, make it a fairly complete package.
And after a hectic period of development (where we saw not only different Betas, but final candidates with days off), now we have with us the final version of Opera 10.5, perhaps rushing out to have the new version ready for compete in Europe, where Microsoft has been forced to display a screen with different choices of browsers (the popular "Ballot Screen")