I have ppa:cr3/ppa in my sources list. It upgrades my checkbox, checkbox-gtk, and checkbox-qt packages to version 0.14~ppa6.12.04. And now I have problems with updating my system, and sometimes critical system errors.
I tried to use ppa-purge to downgrade them - it didn't work. I tried to delete them from synaptic - it wants to delete ubuntu-desktop with them.
When I try to update system I'm getting an error:
checkbox
checkbox-gtk
checkbox-qt
E: Sub-process /usr/bin/dpkg returned an error code (1)
How can I solve this problem?