[ellson] I suspect this bug is due to building on Leopard (with python-2.5) and then running on SnowLeopard (with python-2.6).
I suspect the fix requires adding a SnowLeopard build host.
[north] Well, we could try adding a Snow Leopard build host.
I'm working on configuring one in the lab now.
It appears we can't get away with having one package for both OSX 10.5 and 10.6
if people want to use advanced features like scripting plugins.
This is not that surprising.