Few days ago was released Gimp 2.8, the changes in GIMP 2.8rc1 since 2.7.5 are mostly not user-visible. The code was updated to work with newer versions of GEGL and babl, fixed GFig rendering issue and more.
To install this beta release of Gimp in Ubuntu 12.04, use the following PPA:
sudo add-apt-repository ppa:otto-kesselgulasch/gimp sudo apt-get update sudo apt-get install gimp
Via lffl