This started happening to me after updating my nvidia drivers to 178.24. Poser was rock solid before that, it hadn't crashed in MONTHS.

The only way I can work with a scene now is to set the preview settings to Sreed>Software buffer, disable hardware shading, save settings. Then reset back to OpenGL>Software (always crashes when the buffer is set to hardware), re-enable hardware shading, save settings.

After doing that, the scene is smooth and responsive, but I have to go through these hoops EVERY TIME I load a new scene.