Yes, checking "Normals Forward" will fix Sharkey's wings.

With the wings, you can also reverse the normals with the grouping tool. (For Poser 5, say, which doesn't have the "Normals Forward" option.) Sharkey's wings are inside out, as Poser sees things, so reversing the normals fixes the problem.

You can't do that with the dragon wings, because you're looking at both sides of one surface. If you reverse the normals, the top of the wings will be wrong.