In reaction to this thread I have added an item to address this question to http://people.debian.org/~bap/dfsg-faq.html which I believe summarizes the consensus here, as well as the expressed opinion and intent of the FSF regarding the "or later" clause. -- Barak A. Pearlmutter <barak@cs.may.ie> Hamilton Institute, NUI Maynooth, Co. Kildare, Ireland http://www-bcl.cs.may.ie/~barak/