Was there any figure attached to the carousel that was turned invisible?  The Hierarchy panel should also show if it is visible or not (the eye next to the content).  The visibility eye should not be grayed out.  Everything you described should not present a problem.  If it was material shader related, you would still see the object.  It almost sounds like a file corruption.  At this point, I would restart the whole system and open the Poser scene again.  Otherwise, submit a support ticket.