Yes Zbrush is a nutty little app but great for morphs.    A_  : Lyrra is correct,  Your body part seams are not welded, if you exported from Poser you forgot to weld the seams, weld the seams.   Then when you are ready to import your morph back into Poser use kaweki's morpher tool (free in the freebies here) to reorder your vertices back to the original obj. A better idea,  if you can, is to use a copy of the original obj located in the geometries folder to do your morphs on, it is already welded.

kaweki's morpher is a geat little tool to have, and it's free.  But for ease of use and better work flow, investing in the Daz setup tools is the way to go.

You see, Poser cuts the obj up into parts corresponding to each body part.

WandW:  I'm afraid I made no great discoveries. Only this:  If you import and export an obj that is not turned into a figure yet (no bones) there is no problem at all the obj stays perfectly symetrical. But as soon as you add a few bones and turn the obj into a figure it becomes asymetrical. And yes it is definitely very slightly rotated.  Why or how this happens I have no explanation. I suspect it has something to do with how Poser cuts the obj up into parts and stores that info.

So, how did you guys get out of jail? :lol:

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A HOMELAND FOR POSER FINALLY