What is in your default scene?  Is it only happening with V4?  Are there any Python scripts being run as startup scripts?  Are you using external binary morphs?  What version of Poser are you using?

As you can see, I'm just kind of throwing guesses out there.  I'm not sure what to suggest, with the current information.  The more you can tell us, the more likely it is that someone here will figure things out.  But you might want to contact SM about it, too.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.