I would have thought a software and IP-house such as Apple would keep its path clean and make sure not to infringe other peoples copyright or downright steal other peoples creations. Not so it seems.
The page in question that had made it on to the Apple web site, was a chopped-off version of the rounded corners tutorial, incorporated into the WebCore layout tests for generated content, most likely since earlier versions of Safari exhibited some very funky rendering (screenshot).
The short story: Code, images and a tutorial for CSS rounded corners, created by norwegian blogger Arve Bersvendsen was stolen by a team member at Apple, included in source code and the tutorial published (a pure copy) on the Apple website. When confronted with the ordeal, Apple goes mute and refuses to try to straighten out the obvious infrigement on copyright.
I guess they think they are big enough to just ignore cases such as this one.