I'd probably consider upgrading to a newer linux distro anyway.
That way, you'd have easy access (a few mouse clicks) to newer versions of other digital imaging applications via a newer distro's repositories. For example, the newer 1.0.0 version of digiKam
is really nice (it's a *huge* improvement over the older 0.9.x versions available in something like Hardy's default repositories).
BTW, Linux Mint 8
is a very nice distro using Ubuntu repos that you may want to try, since it has lots of preinstalled browser plugins and codecs, with it's own software repository, in addition to being able to use any of the software available for Ubuntu 9.10. My wife is using it now and she really likes it. Here's a review of it: