apt-cache policy libsasl2{,-modules,-modules-sql} tkmib somewhere Here are the results gateway:~# apt-cache policy libsasl2{,-modules,-modules-sql} tkmib somewhere libsasl2: Installed: 2.1.19.dfsg1-0.5 Candidate: 2.1.19.dfsg1-0.5 Version Table: *** 2.1.19.dfsg1-0.5 0 100 /var/lib/dpkg/status 2.1.19-1.5sarge1 0 500 http://security.debian.org stable/updates/main Packages 500 http://security.debian.org sarge/updates/main Packages 2.1.19-1.5 0 500 cdrom://[Debian GNU/Linux 3.1 r2 _Sarge_ - Official i386 Binary-1 (20060419)] unstable in Packages libsasl2-modules: Installed: 2.1.19-1.5sarge1 Candidate: 2.1.19-1.5sarge1 Version Table: *** 2.1.19-1.5sarge1 0 500 http://security.debian.org stable/updates/main Packages 500 http://security.debian.org sarge/updates/main Packages 100 /var/lib/dpkg/status 2.1.19-1.5 0 500 cdrom://[Debian GNU/Linux 3.1 r2 _Sarge_ - Official i386 Binary-3 (20060419)] unstable in Packages libsasl2-modules-sql: Installed: 2.1.19.dfsg1-0.5 Candidate: 2.1.19.dfsg1-0.5 Version Table: *** 2.1.19.dfsg1-0.5 0 100 /var/lib/dpkg/status 2.1.19-1.5sarge1 0 500 http://security.debian.org stable/updates/main Packages 500 http://security.debian.org sarge/updates/main Packages 2.1.19-1.5 0 500 cdrom://[Debian GNU/Linux 3.1 r2 _Sarge_ - Official i386 Binary-10 (20060419)] unstabl ain Packages tkmib: Installed: (none) Candidate: 5.1.2-6.2 Version Table: 5.1.2-6.2 0 500 cdrom://[Debian GNU/Linux 3.1 r2 _Sarge_ - Official i386 Binary-7 (20060419)] unstable in Packages 500 http://security.debian.org stable/updates/main Packages 500 http://security.debian.org sarge/updates/main Packages W: Unable to locate package somewhere