A while back I had a problem with V4 joints when I imported a Poser scene into C6  (using the native importer).  See thread
http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2742436.

I got that fixed in C6 by setting the joints to "Ball joint", but its happening again in C7 and all the fixes that worked in C6 don't work now.
I normally don't import scene from Poser anymore, but I'm using Poser for the Dynamic clothing until Carrara gets its own (hopefully!).
Anyone else having this problem?