Comment 15 for bug 14486

I put a modified version of apt online at:

http://people.ubuntu.com/~mvo/apt/apt-broken-proxy/apt_0.6.35ubuntu1_i386.deb

You can install it (after the download) with:
$ sudo dpkg -i apt_0.6.35ubuntu1_i386.deb

Then you can run it with:
$ sudo apt-get -o Acquire::BrokenProxy=true update

This will force apt to always re-get the signature file. I would like to know if
that
fixes your problem or if you still see the signature errors then.

Thanks,
 Michael