I am using Ubuntu 11.10. I was using GIMP 2.6 from the repo but I read that GIMP 2.7 has merged windows, I wish I hadn't but I wondered it and added the following PPA: matthaeus123/mrw-gimp-svn
After that it required me to add two other repos:
GIMP 2.7.5 Will not work with the current glib and gtk in Oneiric. To fix the problem install these repos
deb http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu oneiric main
deb http://ppa.launchpad.net/ricotz/testing/ubuntu oneiric main
I added those PPAs and in somewhere a pop-up with "partial-update" appeared I applied the update and restarted Ubuntu. After the restart, my theme was a little bit changed, when I right-click the color is not gray but white and most importantly I am not able to reach:
Software Sources, when clicked it looks as if opening and then closes.
sudo gedit /etc/apt/sources.list doesn't work, because my Gedit doesn't work.
Preferences in Nautilus, when clicked it closes Nautilus.
I would like to revert everything I updated. I would like to downgrade/remove the packages ppa:gnome3-team/gnome3 and ppa:ricotz/testing PPAs but I am unable to do it.
So, I am stuck. How do I restore everything?