"Enabling of restricted repositories"-dialog confusing
When you, for the first time, install something proprietary (I guess from the multiverse repo) you get a dialog that says "Intall unsupported and restricted software?". Then there's a notification about some legal issues and you can press "Cancel" and "Install".
This is, however, confusing, because the user will think the package, after one clicked "Install" that his selected packages will be installed. However, "Install" just enables the extra repositories. This is confusing.
Better would be "Enable access to unsupported and restricted software?" and two buttons "Cancel" and "Enable".