"Analysis of the source code for key open-source projects has
shown fewer than 29 'defects' in every 100,000 lines of code.
"Analysis of the LAMP stack--the Linux platform, Apache web
server, MySQL database and Perl, PHP or Python scripting
languages--showed that the commonly used open-source building
blocks were well below the average for some 32 open-source projects
scrutinised by Coverity..."