Wimvdb;

You may have solved part of the problem. VXG139, try this:

Check your settings under Render/ Render Settings tab/ Preview tab:

When I had Enable hardware shading checked and OpenGL selected, my preview window was terribly slow. I changed the settings to Sreed and unchecked Enable hardware settings. It's not as pretty in Preview, but my character is easy to move around and I have better control of the cameras now. Odd that I never ran into this with Poser 7.

As suggested in another thread I was reading last night, part of the problem may be related to the OpenGL drivers. The driver that comes with certain video cards may not be completely compatible with Poser Pro.