So I guess I majorly screwed up.
In order to install gimp 2.8 I had to upgrade gtk. I first installed 3.4 but it wouldn't work, so I then installed a specific version of 2.4.
Now, after rebooting, my desktop theme had changed and was really ugly, so I decided I'd revert all changes I had made (and gimp 2.8 wasn't really that more useful than 2.6). I went back to my packages and did sudo make uninstall on all of them.
After another reboot, no more desktop, not even a login prompt, all I see is the console which usually briefly appears before the login prompt, with things like "bluetooth started". I can't seem to be able to interact with it. The only time I can make it change is when I press the power button and it shuts down all services before powering off.
I'm now logged in from the install cd, and I'd be really happy to find a fix instead of having to reinstall everything from scratch..
Anybody knows how to? Thanks in advance!