WebCore (the actual rendering fundamentals itself) was open source before WebKit (the bigger chunk of code that makes up more of a browser's features). When cod

WebCore (the actual rendering fundamentals itself) was open source before WebKit (the bigger chunk of code that makes up more of a browser's features). When code was released back to KHTML, it came in big chunks with large changes because WebKit development was being taken in a different direction and at a much higher speed than KHTML. Therefore backporting was extremely difficult, and it seems like the WebKit people were not too eager to spend time documenting all of their changes back against existing KHTML code, so they just dumped out big patches and diffs without much commenting. Some features were backported, but you can see today that WebKit is farther ahead than the KHTML fork, and receives a lot more attention.