I have apt-cacher-ng installed on my PC (running 12.04 desktop version) on my home network.

I notice that every time I run apt-get update through acng, it downloads the package index files in full, which is 11MB or so in my case.

This seemed like it might be related to this bug: https://bugs.launchpad.net/ubuntu/+bug/1001780.

The bug has been fixed for direct repository access, but I'm still getting the big downloads when I update through acng.

Is this expected behaviour? If not, what should I be looking at on my own system before I go reporting a bug?