Rounded rectangles are totally functional if you consider that you're going for the most minimalist interface compatible with the human visual cortex. Sharp cor

Rounded rectangles are totally functional if you consider that you're going for the most minimalist interface compatible with the human visual cortex. Sharp corners can cause all kinds of ringing artifacts in certain situations: http://en.wikipedia.org/wiki/Hermann_grid_illusion http://en.wikipedia.org/wiki/Hermann_grid_illusion