Actually I misspoke, I meant behavior change rather than API change. So yes I would bump the version for bug fixes too.

What I was trying to say is that I was basically shipping multiple modules that *could* have been their own dists. I wanted the versions to tell people that Foo::A 1.01 could be found in Foo-1.01.tar.gz or Foo-1.02.tar.gz or Foo-1.03.tar.gz, and a dependency on Foo::A 1.01 could be satisfied by any of those dist versions.