&gt; The remaining 30% of the time it is a spot enclosed by a tinted circle.<p>That&#x27;s the way I&#x27;ve always seen it, and I think it&#x27;s a UX error. As you say, most people don&#x27;t even see the circle as the potential error in accuracy. IMO it should be just the enclosing circle, otherwise people only see the point; with just a circle there&#x27;s less ambiguity.