debian:/home/alexmax# apt-get update
Get: 1 http://ftp.us.debian.org testing Release.gpg [189B]
Ign http://deb.opera.com testing Release.gpg
Hit http://ftp.us.debian.org testing Release
Ign http://deb.opera.com testing Release      
Ign http://deb.opera.com testing/non-free Packages/DiffIndex
Ign http://deb.opera.com testing/non-free Packages
Hit http://deb.opera.com testing/non-free Packages
Get: 2 http://ftp.us.debian.org testing/main Packages [3988kB]
Get: 3 http://ftp.us.debian.org testing/contrib Packages/DiffIndex [12.5kB]
Get: 4 http://ftp.us.debian.org testing/non-free Packages [52.7kB]
Get: 5 http://ftp.us.debian.org testing/main Sources [1170kB]
Get: 6 http://ftp.us.debian.org testing/contrib Sources/DiffIndex [12.5kB]
Get: 7 http://ftp.us.debian.org testing/non-free Sources [25.3kB]
Fetched 25.0kB in 17s (1413B/s)                                                
Failed to fetch http://ftp.us.debian.org/debian/dists/testing/main/binary-powerpc/Packages.bz2  MD5Sum mismatch
Failed to fetch http://ftp.us.debian.org/debian/dists/testing/non-free/binary-powerpc/Packages.bz2  MD5Sum mismatch
Failed to fetch http://ftp.us.debian.org/debian/dists/testing/main/source/Sources.bz2  MD5Sum mismatch
Failed to fetch http://ftp.us.debian.org/debian/dists/testing/non-free/source/Sources.bz2  MD5Sum mismatch
Reading package lists... Done
W: Couldn't stat source package list http://ftp.us.debian.org testing/main Packages (/var/lib/apt/lists/ftp.us.debian.org_debian_dists_testing_main_binary-powerpc_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://ftp.us.debian.org testing/non-free Packages (/var/lib/apt/lists/ftp.us.debian.org_debian_dists_testing_non-free_binary-powerpc_Packages) - stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems
E: Some index files failed to download, they have been ignored, or old ones used instead.