Quality Assurance
Open source projects like to quote Eric Raymond: "Many eyes make all bugs shallow."  That's not an excuse for sloppy or missing quality assurance practices, even (or especially) on an open-source project.
Each of the sections to the left will eventually describe the project's approach to that given area of quality assurance. For now, I have dropped into each some extracts from a white paper I wrote some years back on object-oriented quality assurance.