Okay, it's not py3k that's broken. It's just that I can't load jpgs (I think) because I can't use Pil to create a TkSomething graphics canvas (at least that's how it goes in the tutorial). Which means I can't try out what I wanted to try out using py3k. Hum.
So I've reconfigured the project to Py26. It's a bit disappointing not to be able to use the latest version of my favourite language, but at least I can use the most exciting language features in Py26.