<i>I don't believe for a minute that Apple is any more open than they are legally required to be...</i><p>You would be right to point out that Gruber was mistaken in saying KHTML is BSD-licensed, but the rest is demonstrably false.<p>They were legally required to open source Web<i>Core</i>, derived from KHTML, because it is LGPL. And they did so, as soon as Safari was announced. They were not legally required to release Web<i>Kit</i>, which is BSD. That release came several years later, and is certainly a more significant project than KTHML or WebCore alone are.