Oh, it's not a problem.  I was just thinking maybe it was an indicator of some kind. 

This is so weird.

Until I asked for the feedback, it was performing as if it were version 1.4, which is the version RevisionHistory.txt said had Scatter but not Scatter group.  Mind, I had updated to 1.5 some  time ago.  I deleted the files before replacing them, restarted, and none of it helped.  Then I added the print statement, and it gave me what seems to be the same thing you posted.

material
['Apple', 'Chicken1', 'Chicken2', 'Color', 'Cream', 'Inputs', 'Ketchup', 'Marble', 'Material', 'MaxError', 'PType', 'Potato', 'Scale', 'Scatter_Group', 'Skimmilk', 'Skin1', 'Skin2', 'Texture_Detail', 'Use_Material_Color', 'Wholemilk', 'abs', 'add', 'class', 'delattr', 'dict', 'div', 'doc', 'format', 'ge', 'getattribute', 'gt', 'hash', 'init', 'le', 'lt', 'mod', 'module', 'mul', 'neg', 'new', 'pow', 'radd', 'rdiv', 'reduce', 'reduce_ex', 'repr', 'rmod', 'rmul', 'rpow', 'rsub', 'setattr', 'sizeof', 'str', 'sub', 'subclasshook', 'weakref', 'asNumber', 'checkAsNumber', 'collectPMNodes', 'defName', 'emit', 'emitAuto', 'emitTrailer', 'getHeight', 'getName', 'guardUnknownSets', 'height', 'init', 'inputsCollapsed', 'itype', 'label', 'labelled', 'lvl', 'mapColorIf2', 'name', 'pmColumn', 'pmIndex', 'pos', 'showPreview', 'suffix', 'suffixed']

And now Scatter_Group works for me. It also started saying whether or not the material had changed, which it didn't before that.  But it's still overlapping nodes.  Which isn't a problem at all for me, just an indicator that it's somehow using old information.  It's like Poser keeps information in cache somewhere that needs to update. 

But I can't say.  All I actually know is that I did have a problem with Scatter_Group after deleting the original files, installing twice and restarting, and now I don't.