The latest stable GIMP 2.8 is great in many ways such as the sane integration of docks, speed and some nice addons. It installs like a charm on Windows 7 and the aging XP. Getting it to work on the latest *buntu and Fedora is also easy, although both these flavors suck as far as stability and usability is concerned. But if you expect it to play nicely on your reliable CentOS 6.2 or Debian 6.0.5, forget it. Cos you may fuck your entire system just to get it installed.
I was very much at home with my mighty Debian untill I was lured by GIMP 2.8.
I knew Debian Squeeze repo will never have it. So, looked for backports. Nothing there too.
rest here