I just came across the same issue using P7 and VueInfinite (both are the most recent versions) on an Intel MacBook Pro.
Saving the P7 in P6 helped to import the hair and two other props that where missing. But I ran into another issue with the second figure. It's the Biguana lizzard which doesn't import properly. It's backfin looks kind of strange and doesn't fit to the back anymore. ARGGG!!!!

For this very reason I did most of my recent images without Vue, but there are certain ones where I desperately need Vue's lanscaping capabilities.
I'm really frustrated that it's always such a pain to get Vue and Poser work together correctly. :(