oh , yeah … tell me about that ! 
i’ve been into this before … and i think its a max thing or zbrush thing or both 
what i did and solved the problem " for me at least " was that
1- in the uv editor in max turn " display distorted edges "
2-i played with the red edges in the uv layout to become more grren
3-try to find a very close vertices to eachother a very close in relation to the
whole layout and try to make them away alittle
4-select overlapped faces … " you should get none "
5-select inverted faces … " you should get none "
now close uv editor … utility resetxform --> reset selected … and then in the modify panel collapse all
and try to export again to zbrush … as you expected … the 1st thing to do is UV check … another red line ? do the above steps again …!
you may think this is insane but insanity worked for me !