W: Failed to fetch http://ftp.us.debian.org/debian/dists/squeeze/Release Unable to find expected entry unstable/source/Sources in Meta-index file (malformed Release file?)

["Daniel M. Drucker" <dmd@3e.org>]

When I run apt-get update, I get:

root@up:/home/dmd# apt-get update

Hit http://opensource.wandisco.com squeeze Release.gpg

Ign http://opensource.wandisco.com/debian/ squeeze/svn17 Translation-en        

Ign http://opensource.wandisco.com/debian/ squeeze/svn17 Translation-en_US     

Hit http://opensource.wandisco.com squeeze Release                             

Ign http://opensource.wandisco.com squeeze/svn17 amd64 Packages                

Hit http://ftp.us.debian.org squeeze Release.gpg                               

Ign http://ftp.us.debian.org/debian/ squeeze/main Translation-en               

Ign http://ftp.us.debian.org/debian/ squeeze/main Translation-en_US            

Ign http://ftp.us.debian.org/debian/ squeeze/unstable Translation-en           

Ign http://ftp.us.debian.org/debian/ squeeze/unstable Translation-en_US        

Hit http://ftp.us.debian.org squeeze-updates Release.gpg                       

Ign http://ftp.us.debian.org/debian/ squeeze-updates/main Translation-en       

Ign http://ftp.us.debian.org/debian/ squeeze-updates/main Translation-en_US    

Ign http://opensource.wandisco.com squeeze/svn17 amd64 Packages                

Hit http://opensource.wandisco.com squeeze/svn17 amd64 Packages                

Hit http://backports.debian.org squeeze-backports Release.gpg                  

Hit http://backports.debian.org/debian-backports/ squeeze-backports/main Translation-en

Ign http://backports.debian.org/debian-backports/ squeeze-backports/main Translation-en_US

Hit http://ftp.us.debian.org squeeze Release                                   

Hit http://ftp.us.debian.org squeeze-updates Release                           

Hit http://backports.debian.org squeeze-backports Release                      

Hit http://ftp.us.debian.org squeeze/main Sources                              

Hit http://ftp.us.debian.org squeeze-updates/main Sources/DiffIndex

Hit http://ftp.us.debian.org squeeze-updates/main amd64 Packages/DiffIndex     

Hit http://backports.debian.org squeeze-backports/main amd64 Packages          

Hit http://ftp.us.debian.org squeeze-updates/main amd64 Packages

Hit http://security.debian.org squeeze/updates Release.gpg   

Ign http://security.debian.org/ squeeze/updates/main Translation-en

Ign http://security.debian.org/ squeeze/updates/main Translation-en_US

Hit http://security.debian.org squeeze/updates Release

Hit http://security.debian.org squeeze/updates/main Sources

Hit http://security.debian.org squeeze/updates/main amd64 Packages

W: Failed to fetch http://ftp.us.debian.org/debian/dists/squeeze/Release  Unable to find expected entry  unstable/source/Sources in Meta-index file (malformed Release file?)

Here is my sources.list:

deb http://ftp.us.debian.org/debian/ squeeze main unstable

deb-src http://ftp.us.debian.org/debian/ squeeze main unstable

deb http://security.debian.org/ squeeze/updates main

deb-src http://security.debian.org/ squeeze/updates main

deb http://ftp.us.debian.org/debian/ squeeze-updates main

deb-src http://ftp.us.debian.org/debian/ squeeze-updates main

deb http://backports.debian.org/debian-backports squeeze-backports main

I have tried running apt-get clean and autoremove; no change.

--

Daniel M. Drucker, Ph.D.

dmd@3e.org