It looks to me like a shadow problem. Try using the face camera to look really closely at the ear, see if there is anything nearby (hair) which may be shadowing it. You could remove the hair or select it and pick the option for the object to NOT cast shadows) Then re-render. The other possibility (and I do not know if it applies to poser - is that the texture map for the head is not completely mapping to the ears. This happens in another package I have if you alter the geometry by applying morphs. Great looking character.