I don't think so...
V4 has "water-tight" nostrils yet had that problem with some textures.
I think it might have to do with some textures still using Ambient_Color/Value settings to avod them looking pitch black.
I use IDL and my own shader tree for V4, and the nostrils use the same shader as the rest of the figure. Never had problems with nostril glow since then.

I might be wrong about the cause of nostril glow... but it works for me.

Peter