Thanks, Gary, that did the
trick. Just adding more Puppet Pins that don't animate held the head
in place just fine.
I watched three tutorials about the Puppet
Tool today, and two of them glossed over the Starch Tool. In one (the
Richard Harrington video on Adobe TV), the guy added several Starch
Pins, and then a few more, and the layer section containing them was
still moving around.