Comment 4 for bug 1061863

I was able to get grub-customizer to run again in Ubuntu 12.04. I deleted the PPA (through the software center), removed grub-customizer from my system and finally reinstalled:
sudo add-apt-repository ppa:danielrichter2007/grub-customizer
sudo apt-get update

Pay attention below:
sudo apt-get install -f grub-customizer

Hope this helps others.