As melinda_sayang said, it all depends on what distro you're using. Gnome.org even tells you that its not the best idea to download it from their website, but to get it from your specific distro.
I don't beleive 2.6 has made it into debian sid yet, it's probably still in experimental, but you need a bit more experience using linux to start using experimental packages.
oops, didnt see the link....guess you could try that