We just ran into this problem yesterday. A box with overflow: scroll will appear un-scrollable to users. It is a great example of form over function. Apple is too far on the form part of the equation quite often. Another example are the sharp edges on laptops... it makes you wonder if "user is able to slit wrists with edge of laptop" is one of their user stories. Obviously "looks cool" has it's drawbacks as a product requirement ( and I'm a designer ).

Slicing apple with laptop video: http://www.youtube.com/watch?v=rZvMlzVxQJE