The geometry is fine - to human eye (mine in particular).
Those couple of blemishes on one side is just a result of head-shot image blending/composing with the CC texture, which usually happens.
If you are looking for absolute perfection, you can symmetrize a Diffuse map in headshot (you should notice the asymmetry there).
Just slash canvas in half, trim, restore original canvas, duplicate layer, mirror it and move it in place (left or right - whichever you slashed).
Or you could symmetrize the head material textures at the end when you are done with head-shot skin settings and then use symmetry tool in Edit Mesh just in case.

(Switch to Orthogonal camera for better evaluation)

Again, this is not the mesh issue. Do not try to fix it with mesh editing tools. Work with texture.

I looked at the Mythcons tut. Your base image is way too narrow to compare. It got narrow when you mirrored it I suppose. Try to widen it, make it lighter.
Now look at the generated Diffuse map - scroll all the way to the bottom and check Photo Diffuse - it is asymmetrical. You may edit and mirror it as well, as I suggested in my first reply.
But first, work with base image. It should improve generated Photo Diffuse map.

Also make sure to set the Skin Color lighter in Skin Type settings. It has to match the face color.
You may sample the color from Photoshop and then paste hex value into Skin Color picker, or match it manually.
That should help to do a seamless blending when you re-project.

Hi there. Sorry, I did not see this thread.

In addition to what 4u2ges said, there is a way to achieve symmetry within Character Creator, but I would only recommend doing it after you're happy with your projected texture. Because once you use it, you'll no longer be able to re-project your texture.

1) Pick a side of the model you want to make symmetrical. Some photos make this difficult, the model's head will be tilted, making this procedure a bit more work. You don't want to make the head too thin or thick.

2) Adjust one of the eyes so that its in the center of one of the eye sockets (e.g. position left eye in left eye socket). I used the 'Element' mode in the Edit Mesh menu, and then use the movement tool.




3) Adjust rigging to include face and eyes. This will line up the bones in the eye socket.



4) Mirror the bones on the side with the correct placement of the eye. This will move the eye other eye into the correct place.



5) If the teeth are out of alignment, you can Edit the mesh, use the 'Element mode' and selected all the meshes (teeth, gums) and then move them into the center with the Move tool (which has visual centering arrows). Then readjust the bones.