Sometimes, Ubuntu Software Center won't let you install some program or other, displaying the error: “The package is of bad quality.”
While this may be true and sound advice, this doesn't help when the package in question belongs to one of your indispensable programs.
You can bypass Software Center force an install the .deb package in two ways.
The first is using DPKG, another command line option taking the format:
sudo dpkg -i PACKAGENAME.deb
The second option is to resort to the Gdebi package installer, which is a stand-alone graphical front-end to install packages without all of Software Center's checks.
Both will still complain if you have unsatisfied package dependencies, so they are not a 'get out of jail free' cards. RC