Binary package “apt-forktracer” in ubuntu lucid
a utility for tracking non-official package versions
apt-forktracer tries to alleviate the problem that APT stops tracking official
versions of a package after you pin it or install a newer version.
It displays a list of packages which are in an inconsistent state or have a
version other than the newest official installed. You can choose to ignore
certain packages - if they match certain criteria - with a configuration file.