As the title explains, male models (and only male models) are currently suffering from a slightly broken Watershaper's Robe model - the neck seam does not correctly match the head model's height, which results in a visible transparent seam - this is consistent in all races, although the issue is not readily apparent with Tekehu due to his skin being the same shade as the character screen paperdoll background.
As follows:
This issue has been verified on the live 2.0 patch