Hmm.  It's more complex than I noted earlier, this leak.  It varies in size, depending on what shrinkMesh I'm using, and it only seems to occur the first time I run the script using that particular shrinkMesh.  So presumably it relates somehow to shrinkMesh handling.

The attached copy of the elaborate shrinkwrap script has a couple of corrections....

===========================sigline======================================================

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.