Bug#641769: Similar bug

[Filipus Klutiero <chealer@gmail.com>]

Note that a new similar bug has appeared with the modularization of 
package descriptions (see 
https://lists.debian.org/debian-devel/2012/02/msg00149.html).
There are Hash Sum mismatch errors blaming Translation files:

> # LANG=C apt-get update
> Hit http://debian.mirror.iweb.ca wheezy InRelease
> Hit http://debian.mirror.iweb.ca sid InRelease
> Hit http://debian.mirror.iweb.ca experimental InRelease
> Hit http://security.debian.org wheezy/updates InRelease
> Hit http://debian.mirror.iweb.ca wheezy/main i386 Packages/DiffIndex
> Hit http://debian.mirror.iweb.ca wheezy/contrib i386 Packages/DiffIndex
> Hit http://debian.mirror.iweb.ca wheezy/non-free i386 Packages/DiffIndex
> Hit http://debian.mirror.iweb.ca wheezy/contrib Translation-en/DiffIndex
> Get:1 http://debian.mirror.iweb.ca wheezy/main Translation-en [3834 kB]
> Hit http://debian.mirror.iweb.ca wheezy/non-free Translation-en/DiffIndex
> Hit http://debian.mirror.iweb.ca sid/main Sources/DiffIndex
> Hit http://debian.mirror.iweb.ca sid/main i386 Packages/DiffIndex
> Hit http://security.debian.org wheezy/updates/main i386 Packages
> Hit http://debian.mirror.iweb.ca sid/contrib i386 Packages/DiffIndex
> Hit http://debian.mirror.iweb.ca sid/non-free i386 Packages/DiffIndex
> Get:2 http://debian.mirror.iweb.ca sid/contrib Translation-en [36.8 kB]
> Ign http://security.debian.org wheezy/updates/main Translation-en
> Get:3 http://debian.mirror.iweb.ca sid/main Translation-en [3953 kB]
> Hit http://debian.mirror.iweb.ca sid/non-free Translation-en/DiffIndex
> Hit http://debian.mirror.iweb.ca experimental/main i386 Packages/DiffIndex
> Hit http://debian.mirror.iweb.ca experimental/contrib i386 
> Packages/DiffIndex
> Hit http://debian.mirror.iweb.ca experimental/non-free i386 
> Packages/DiffIndex
> Hit http://debian.mirror.iweb.ca experimental/contrib 
> Translation-en/DiffIndex
> Get:4 http://debian.mirror.iweb.ca experimental/main Translation-en 
> [137 kB]
> Hit http://debian.mirror.iweb.ca experimental/non-free 
> Translation-en/DiffIndex
> Fetched 4 B in 8s (0 B/s)
> W: Failed to fetch 
> bzip2:/var/lib/apt/lists/partial/debian.mirror.iweb.ca_debian_dists_wheezy_main_i18n_Translation-en  
> Hash Sum mismatch
>
> W: Failed to fetch 
> bzip2:/var/lib/apt/lists/partial/debian.mirror.iweb.ca_debian_dists_sid_contrib_i18n_Translation-en  
> Hash Sum mismatch
>
> W: Failed to fetch 
> bzip2:/var/lib/apt/lists/partial/debian.mirror.iweb.ca_debian_dists_sid_main_i18n_Translation-en  
> Hash Sum mismatch
>
> W: Failed to fetch 
> bzip2:/var/lib/apt/lists/partial/debian.mirror.iweb.ca_debian_dists_experimental_main_i18n_Translation-en  
> Hash Sum mismatch
>
> E: Some index files failed to download. They have been ignored, or old 
> ones used instead.
> root@vinci:/var/log#

Mirrors can fix that by upgrading to ftpsync 80486: 
http://lists.debian.org/debian-mirrors/2012/05/msg00037.html