apt-get update fails

[Avi Schwartz]

In the last few days I am seeing the following errors when attempting 
"apt-get update":


For a AMD64 installation:


Failed to fetch 
http://security.ubuntu.com/ubuntu/dists/feisty-security/main/binary-amd64/Packages.bz2  
MD5Sum mismatch
Failed to fetch 
http://security.ubuntu.com/ubuntu/dists/feisty-security/universe/binary-amd64/Packages.bz2  
MD5Sum mismatch
Reading package lists... Done
E: Some index files failed to download, they have been ignored, or old 
ones used instead.


For a X86 installation:


Failed to fetch 
http://security.ubuntu.com/ubuntu/dists/feisty-security/main/binary-i386/Packages.bz2  
MD5Sum mismatch
Failed to fetch 
http://security.ubuntu.com/ubuntu/dists/feisty-security/universe/binary-i386/Packages.bz2  
MD5Sum mismatch
Reading package lists... Done
E: Some index files failed to download, they have been ignored, or old 
ones used instead.


Anyone else seeing it?  Any fix?


Avi