ok, maybe i'm doing something wrong, but none of these .objs have worked with groups to Blender objects on import:

• Posette's source - I have P6, but I probably do need to edit it.
• David's source
• A V4 head exported with groups that imports back into Poser OK

i'll take a look at the head in EditPad tonight.  if you have the time for any advice or information on what to look for or correct besides empty groups, that would be very kind and going above and beyond.