title: Why does setting my CALayer's opacity seem to also affect sublayer's opacities?
body: <p>I am not explicitly setting my sublayers' opacity -- only the superlayer's via the <code>opacity</code> property. While the superlayer's opacity does change as expected, my sublayers' opacities also appear to change, causing elements below those sublayers <em>within the superlayer</em> to be exposed. Why might this be happening?</p>