While that's great and good info if we ever decide to revamp the older characters, I think we were talking doing a generation 2 of Rex and Roxie. I could be misunderstanding though, I do that a lot these days.  

The older figures aren't designed to work with the subD in the latest Poser, so you're likely to run into issues. I am not in a position to look at what errors you're seeing on my end though so I'm going to guess the problem is spiking. This can happen due to poor welds, bad topology (like N-Gons), or in rare cases even extreme proximity between vertices.  Without looking at the mesh or even a screen shot, I can't tell you which it is but I'd start looking in the area and trying to see if any of that is going on.