No problems with the UV's as long as you don't use a texture with painted on "underboob shadows".

 

I really messed up the "areola" uvs more than a few times in Zbrush when I was trying to get results. I cannot produce data but I'm guessing excessive smoothing over chest/areola zones were responsible. I wish they were not separate. Nor the lips nostrils, eyesockets or even lacrimals.

 

Zanzo is going to love this new thread "development" ;)))