Mine was a bit bizarre.
I set up my Poser 6 Runtime easily and all was working fine until - I use mainly P4 figures and all of them always worked well with simply Basic Hands in using Poser 6, but as soon as I tried one here, the figure vanished - A box said something about wrong vertices or some such but it definitely worked in 6. The figure still was listed as being active but there were no parameter dials for any part and the whole figure was invisible. I do like the compression for file sizes, but since the rest of the P7 features are not of that much interest right now, I don't see the point of bumping into another obstacle. I also had some minor things with the initial version of P6 but they were attended to in time so I'll wait.