On Jan 9, 2008 4:01 AM, Michal Čihař <nijel@debian.org> wrote: > "commercial distribution may impose other > requirements (e.g., acknowledgement of copyright or inclusion of the > raw nroff sources with the commercial distribution)" Sounds to me like that may just be a reference to the requirements of licences such as the GPL. Neither of those requirements in itself would be non-free. John (TINLA)