I am trying to install a .DEB file using my Ubuntu Software Center in Ubuntu 11.04, I get this error that the package has undesirable quality and I should contact the provider. Here is the exact error for your reference so can suggest resolution properly.
“The package is of bad quality. The installation of a package which violates the quality standards isn’t allowed. This could cause serious problems on your computer. Please contact the person or organization who provided this package file and include the details beneath.”
Please see the picture below for your reference:

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Hi Kim, your problem can be solved because there have been former experiences of the sort. The issue in this case may be with the software package, it may not be in terms with the debian policy, therefore be considered as of poor quality.
It may be having file ownership errors.This is what you need to do to solve these errors;
You need to install the .DEB files using dpkg
- Download your files in the .deb format and put them in the ~/Downloads folder. Run the following commands in a terminal to install the .deb files
cd ~/Downloads
sudo dpkg -i *.deb
sudo apt-get install-f
Install .deb files using Gdebi
Thanks
Hi,
The meaning can be different from deb to deb, it means something is missing or not packaged 100% right. You can install it using dpkg:
Assuming you have downloaded the .deb in your ~/Downloads folder, run the following commands in a terminal to install all the .deb files:
cd ~/Downloads
sudo dpkg -i *.deb
sudo apt-get install -f
Or use Gdebi. Install Gdebi first:
sudo apt-get install gdebi gdebi-core
Right click a .deb file and choose Open with Gdebi Package Installer.
To make certain that packages you install using the Software Center are free of errors and Debian policy violations they are checked using Lintian. Only in that case, the installation of a package will be granted.