Right, that’s true. There’s not much point in keeping compatibility then; when someone builds Panda3D for Python 3, it will only have to work with Python 3.
I don’t have a working build at the moment, since even my 64-bit build crashes due to a different issue. I’m currently in the middle of releasing 1.8.1, and next week I plan on participating in PyWeek, so I’m afraid I won’t have much time to look into it soon.
If you have any questions then please don’t hesitate to ask.