"The Debian GNU/Linux distribution has 3 different 'versions' at
any particular time. 'stable', 'testing' and 'unstable'. Unstable
is where the development work happens, and after it is known to
work for a while new software goes into testing. After a while, no
new packages are allowed into testing, and it is tested and
debugged to eventually become the stable version. Stable only
receives security updates, and since Debian's stable release cycle
is slow, software in stable is often old.
"So what is a backport exactly? Jaime tells DesktopLinux.com
that his backport uses software from unstable, which is compiled to
run on Debian stable. This is a great boon to user's of Debian
stable that want the stability and security of Debian stable, but
with updated software. It is an 'unofficial' backport, but many
have provided feedback that they found it useful..."