Ian, have you tried doing an "sudo apt-get update" first because I can see newer versions of some of those packages in the repo:-
http://security.ubuntu.com/ubuntu/pool/main/s/samba/smbclient_3.0.26a-1ubuntu2.2_i386.deb for example supersedes http://security.ubuntu.com/ubuntu/pool/main/s/samba/smbclient_3.0.26a-1ubuntu2.1_i386.deb that you tried to get.
Ian, have you tried doing an "sudo apt-get update" first because I can see newer versions of some of those packages in the repo:-
http:// security. ubuntu. com/ubuntu/ pool/main/ s/samba/ smbclient_ 3.0.26a- 1ubuntu2. 2_i386. deb for example supersedes http:// security. ubuntu. com/ubuntu/ pool/main/ s/samba/ smbclient_ 3.0.26a- 1ubuntu2. 1_i386. deb that you tried to get.