I read "Yes, Poser4 figures should work in Poser 5. Maybe not with all the features." to mean that yes Poser 4 items will all work with Poser 5, but they may not be able to take advantage of all the new features in version 5 and will only work the same way they worked in version 4. For instance clothing items made for Poser 4 may not be able to take advantage of collision detection, but clothing made for Poser 5 would. That seems reasonable to me, anyway.