Sometimes when sticking with a Debian stable
version, it can be useful to just update one or two packages to a testing
or even unstable
version, because of new features.
The ideal way to do this is to use backports, because these have been tested (and patched if necessary) to work with the stable
versions of other packages. The backports repository is added to /etc/apt/sources.list
deb http://backports.debian.org/debian-backports/ squeeze-backports main contrib