Ok, I will answer myself :-) I have found a paragraph in the packaging manual providing the rationale for not making conffiles certain files. However, the given rationale is not enough when the conffile is always the same, so I have just submitted a bug against debian-policy asking for more rationale and/or a clarification. [ hope this is the right thing to do ]. Thanks. -- "2429bfba804d9f31ae3acbd9484ed134" (a truly random sig)