Bug#499379: Hash sum mismatch with apt-proxy

[Colin Wetherbee <cww@denterprises.org>]

I installed apt-proxy on a server last night and was able to `apt-get 
update` from most clients without fail for the first couple hours.

Now, every time I try to update from any client (I have three configured 
to use the proxy at the moment), I get the following message.

W: Failed to fetch 
http://iron.denterprises.org:9999/debian/dists/testing/main/binary-i386/Packages.bz2 
 Hash Sum mismatch

This comes after everything appears to download and decompress correctly.

I tried deleting the contents of /var/lib/apt/lists/, as Harald Braumann 
recommended, on both a client and the server, but this did not appear to 
affect the situation in any way.

This is apt-proxy 1.9.36.3+nmu1 and apt 0.7.20.1

I had never seen these errors, except pathologically, before today.

Colin