Hey you know what eliminates that is if you rotate the camera a little bit before loading anything.
Works for me. I had that problem with P7, Vista Ultimate x64, and the latest 64 bit Nvidia Vista drivers. It's almost like poser needs to be "primed" or something. Weird, but that's the only way I can keep it from crashing. After that, it'll run forever without a problem.
There's also some hack for entering a different value in the Poser.ini file which might help, although for the life of me right now I can't remember what it is.