[Mailman-Developers] withlist fix_url.py error

I'm getting an error that is just beyond my abilities to interpret. This is on debian sarge, running mailman 2.1.5. This actually worked just a bit ago, and now I'm getting this. I'm just not sure where to look for what changed.

talon:/var/lib/mailman/bin# ./withlist -l -r fix_url.py trilug Importing fix_url... Running fix_url.py()... Traceback (most recent call last): File "./withlist", line 275, in ? main() File "./withlist", line 250, in main func = getattr(mod, callable) AttributeError: 'module' object has no attribute 'py'

What's going on here?

Thanks, Joel