Ignore the above. I got a nap, reread the thread and see what you're on about now. Doh!

I wonder, if it's not the mesh itself, if it's an issue with a bump or normal map (if you're using a normal, that is)? 

I remember having an issue like that with lips where there was a subtle ring around the mouth area that I figured out was the seams not lining up after remaking the face texture and not fixing the bump to match. In troubleshooting before I figured out the problem, I removed all depth-effect maps and found where the seam problem came from.

It that isn't it, I can throw some more random darts your way after another nap ;-) 

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