My preorder was in the day they announce P7.
I can only say that I've not had problems with any Poser release yet. They all took some getting used to, but hey... doesn't all software?
I was mercifully mainly spared the major bugs in P5 because I was still mainly using P4 but even when I did use P5 (and after about 6 months I used P5 exclusively) I didn't have much in the way of problems.

There. I've jinxed myself now. :)

Silke