Tabs are, as we all know, inherently evil. :-)
Moved the ConsoleMessage out to the (public) IWebBrowser interface, and documented it at the same time.
Added XML documentation here also.
Let's add the LoadCompleted event to the public IWebBrowser API also, and document it at the same time.
Changed the OnAddressChanged to not be static, which makes the method a lot simpler.
Changed the way we propagate the TooltipText to the browser control(s) to use a method instead of a property (which works better with WPF) + dropped it from BrowserCore. I suspect BrowserCore might be dropped in its entirety in the future; it adds a little bit of value but works poorly with "the WPF way".
Fixed the support for tooltips to work again.