Hello all,
Trying to update a system running Kubuntu Precise.
Running sudo apt-get update results in the following at the end of the process:

Hit http://archive.canonical.com precise/partner i386 Packages                                                   
Ign http://archive.canonical.com precise/partner TranslationIndex                          
Hit http://security.ubuntu.com precise-security/main amd64 Packages                        
Hit http://security.ubuntu.com precise-security/multiverse amd64 Packages                  
Hit http://security.ubuntu.com precise-security/universe i386 Packages                     
Hit http://security.ubuntu.com precise-security/main i386 Packages                         
Hit http://security.ubuntu.com precise-security/multiverse i386 Packages                   
Hit http://security.ubuntu.com precise-security/main TranslationIndex                      
Hit http://security.ubuntu.com precise-security/multiverse TranslationIndex                
Hit http://security.ubuntu.com precise-security/universe TranslationIndex                  
Hit http://security.ubuntu.com precise-security/main Translation-en                        
Ign http://dl.google.com stable/main Translation-en_AU                                     
Hit http://security.ubuntu.com precise-security/multiverse Translation-en                  
Ign http://dl.google.com stable/main Translation-en                                        
Hit http://security.ubuntu.com precise-security/universe Translation-en                    
Ign http://extras.ubuntu.com precise/main Translation-en_AU          
Ign http://extras.ubuntu.com precise/main Translation-en
Ign http://archive.canonical.com precise/partner Translation-en_AU                                                                                                              
Ign http://archive.canonical.com precise/partner Translation-en                                                                                                                 
Fetched 4,919 B in 6s (706 B/s)                                                                                                                                                 
Reading package lists... Done
W: Duplicate sources.list entry http://au.archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages (/var/lib/apt/lists/au.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-amd64_Packages)
W: Duplicate sources.list entry http://au.archive.ubuntu.com/ubuntu/ precise/universe i386 Packages (/var/lib/apt/lists/au.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://au.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages (/var/lib/apt/lists/au.archive.ubuntu.com_ubuntu_dists_precise-updates_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://au.archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages (/var/lib/apt/lists/au.archive.ubuntu.com_ubuntu_dists_precise-updates_main_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems

Unfortunately running sudo apt-get update or sudo apt-get update --fix-missing  doesn't solve the problem.
Could anyone suggest where I should go from here

Thanks

Bob